Problema con iMac 27 late 2009 core 2 duo

[lupetto-]

Salve, come da titolo il mio glorioso iMac 27 late 2009 core 2 duo con 8Gb di RAM e SSD da 128Gb al posto del Super Drive non si avvia piu`, rimane con il simbolo della mela barra di avvio che non finisce piu` di caricare.
Ho provato a fare il ripristino del sistema operativo "Sierra" ma niente.
Ho formattato Hard Disk per reinstallare il sistema operativo ma quando arriva a 6 secondi dalla fine dell`installazione mi da il seguente messaggio di errore "Si e' verificato un errore durante la preparazione dell`installazione. Prova ad eseguire nuovamente questa applicazione"
Ho provato anche versioni precedenti di sistema operativo avendo sempre lo stesso risultato.
Ho provato l`SSD su un portatile installando Windows che ha funzionato regolarmente.
Allego il log dell`ultimo tentantivo d`installazione nella speranza che qualcuno possa aiutarmi a risolvere il problema.

Sep 6 20:26:58 localhost opendirectoryd[165]: opendirectoryd (build 417.50.4) launched - installer mode
Sep 6 20:26:59 localhost opendirectoryd[165]: Logging level limit changed to 'notice'
Sep 6 20:27:03 localhost opendirectoryd[165]: Initialize trigger support
Sep 6 20:27:06 localhost opendirectoryd[165]: created endpoint for mach service 'com.apple.private.opendirectoryd.rpc'
Sep 6 20:27:06 localhost opendirectoryd[165]: set default handler for RPC 'reset_cache'
Sep 6 20:27:06 localhost opendirectoryd[165]: set default handler for RPC 'reset_statistics'
Sep 6 20:27:06 localhost opendirectoryd[165]: set default handler for RPC 'show'
Sep 6 20:27:06 localhost opendirectoryd[165]: starting endpoint for service 'com.apple.private.opendirectoryd.rpc'
Sep 6 20:27:08 localhost opendirectoryd[165]: no dynamic data found at '/System/Library/OpenDirectory/DynamicData/Configure.plist'
Sep 6 20:27:08 localhost opendirectoryd[165]: Registered node with name '/Configure' as hidden
Sep 6 20:27:10 localhost opendirectoryd[165]: no dynamic data found at '/System/Library/OpenDirectory/DynamicData/Local.plist'
Sep 6 20:27:10 localhost opendirectoryd[165]: Registered node with name '/Local' as hidden
Sep 6 20:28:05 localhost powerd[152]: powerd process is started
Sep 6 20:28:22 localhost opendirectoryd[165]: 166.1 - Client: apsd, UID: 0, EUID: 0, GID: 0, EGID: 0
Sep 6 20:28:22 localhost opendirectoryd[165]: 166.1 - ODNodeCreateWithNameAndOptions request, SessionID: 00000000-0000-0000-0000-000000000000, Name: /Search, Options: 0x0
Sep 6 20:28:22 localhost opendirectoryd[165]: 166.1 - ODNodeCreateWithNameAndOptions failed with error 'Unknown node name' (2000)
Sep 6 20:28:37 localhost Unknown[504]: kern.boottime: { sec = 1504754724, usec = 0 } Wed
Sep 6 20:25:24 2017
Sep 6 20:28:41 localhost Unknown[515]: Launching the Language Chooser for an OS Install
Sep 6 20:28:41 localhost launchprogresswindow[513]: ISAP: show progress UI called.
Sep 6 20:37:05 localhost Unknown[517]:
Sep 6 20:37:05 Language Chooser[516] <Error>: CGColorSpaceCreateWithName failed for kCGColorSpaceITUR_709
Sep 6 20:37:05 localhost Unknown[517]:
Sep 6 20:37:05 Language Chooser[516] <Error>: CGColorSpaceCreateWithName failed for kCGColorSpaceITUR_2020
Sep 6 20:37:05 localhost Unknown[517]:
Sep 6 20:37:05 Language Chooser[516] <Error>: CGColorSpaceCreateWithName failed for kCGColorSpaceROMMRGB
Sep 6 20:37:05 localhost Installer Progress[159]: IASGetCurrentInstallPhaseList: can't get optionsRef
Sep 6 20:37:05 localhost Installer Progress[159]: IASGetCurrentInstallPhase: can't get optionsRef
Sep 6 20:37:05 localhost Installer Progress[159]: Current phase is: (null)
Sep 6 20:37:05 localhost Installer Progress[159]: Progress App loading...
Sep 6 20:37:05 localhost Installer Progress[159]: Progress App is running with no progress set.
Sep 6 20:37:05 localhost Installer Progress[159]: IASSetCurrentInstallPhase: can't get optionsRef
Sep 6 20:37:05 localhost Installer Progress[159]: IASSetCurrentInstallPhaseList: can't get optionsRef
Sep 6 20:37:05 localhost Installer Progress[159]: IASSetCurrentInstallPhase: can't get optionsRef
Sep 6 20:37:05 localhost Installer Progress[159]: IASSetCurrentInstallPhaseList: can't get optionsRef
Sep 6 20:37:05 localhost Installer Progress[159]: Progress App running...
Sep 6 20:37:05 localhost Installer Progress[159]: Sending show progress UI to delegate.
Sep 6 20:37:06 localhost Installer Progress[159]: IOProgressColorTheme is set to 0
Sep 6 20:37:07 localhost Installer Progress[159]: Shield windows created.
Sep 6 20:37:07 localhost Installer Progress[159]: Shield windows ordered front.
Sep 6 20:37:11 localhost Unknown[517]: Setting boot completed.
Sep 6 20:37:11 localhost Language Chooser[516]: Waiting for prepaired devices to appear
Sep 6 20:37:12 localhost Installer Progress[159]: Started phase named: Language Chooser
Sep 6 20:37:12 localhost Installer Progress[159]: IASSetCurrentInstallPhase: can't get optionsRef
Sep 6 20:37:12 localhost Language Chooser[516]: All prepaired devices have connected. Continuing.
Sep 6 20:37:12 localhost Language Chooser[516]: Prepaired wait done.
Sep 6 20:37:12 localhost Language Chooser[516]: Could not read prev-lang:kbd to set keyboard.
Sep 6 20:37:12 localhost Language Chooser[516]: No primary language hint found
Sep 6 20:37:14 localhost Language Chooser[516]: ISAP: hide progress UI called.
Sep 6 20:37:14 localhost Installer Progress[159]: Sending hide progress UI to delegate.
Sep 6 20:37:14 localhost Installer Progress[159]: End progress UI called...
Sep 6 20:37:16 localhost Unknown[517]: 2017-09-06 20:37:16.730 Language Chooser[516:9912] NSColorList could not parse color list file /System/Library/Colors/System.clr
Sep 6 20:37:23 localhost powerd[152]: Assertion Created. Type:UserIsActive Name:'com.apple.iohideventsystem.queue.tickle.4294968656.3' Id:0x900008001 Process:hidd [System: DeclUser kDisp]
Sep 6 20:37:30 localhost Language Chooser[516]: Launching the Springboard using language code "it"
Sep 6 20:37:32 localhost Unknown[517]: 2017-09-06 20:37:32.393 macOS Utilities[537:21329] NSColorList could not parse color list file /System/Library/Colors/System.clr
Sep 6 20:37:34 localhost OSIESpringboard[537]: Registering the connection
Sep 6 20:37:34 localhost OSIESpringboard[537]: client 0x7f85da5028e0: phaseName = Install Springboard
Sep 6 20:37:34 localhost OSIESpringboard[537]: client 0x7f85da5028e0: phaseName = "Install Springboard"
Sep 6 20:37:34 localhost OSIESpringboard[537]: ISAP: hide progress UI called.
Sep 6 20:37:34 localhost OSIESpringboard[537]: client 0x7f85da5028e0: phaseName = Install Springboard
Sep 6 20:37:34 localhost OSIESpringboard[537]: Can not connect to /var/run/systemkeychaincheck.socket: No such file or directory
Sep 6 20:37:34 localhost OSIESpringboard[537]: Failed to unlock login keychain.
Sep 6 20:37:34 localhost Installer Progress[159]: Sending hide progress UI to delegate.
Sep 6 20:37:36 localhost Unknown[517]:
Sep 6 20:37:36 macOS Utilities[537] <Error>: CGColorSpaceCreateWithName failed for kCGColorSpaceITUR_709
Sep 6 20:37:36 localhost Unknown[517]:
Sep 6 20:37:36 macOS Utilities[537] <Error>: CGColorSpaceCreateWithName failed for kCGColorSpaceITUR_2020
Sep 6 20:37:36 localhost Unknown[517]:
Sep 6 20:37:36 macOS Utilities[537] <Error>: CGColorSpaceCreateWithName failed for kCGColorSpaceROMMRGB
Sep 6 20:37:36 localhost Unknown[517]: objc[537]: Class TIMLog is implemented in both /System/Library/CoreServices/Menu Extras/TextInput.menu/Contents/SharedFrameworks/TextInputUI.framework/Versions/A/TextInputUI (0x116eec858) and /System/Library/CoreServices/Menu Extras/TextInput.menu/Contents/SharedSupport/TIMCore.bundle/Contents/MacOS/TIMCore (0x116ec9b10). One of the two will be used. Which one is undefined.
Sep 6 20:37:37 localhost Language Chooser[516]: Not hiding Language Chooser in window counter
Sep 6 20:37:48 localhost Unknown[517]: 2017-09-06 20:37:48.562 Disk Utility[542:22373] NSColorList could not parse color list file /System/Library/Colors/System.clr
Sep 6 20:37:48 localhost storagekitd[543]: Starting SKDaemon...
Sep 6 20:37:48 localhost storagekitd[543]: Client entitled for destructive operations
Sep 6 20:37:48 localhost storagekitd[543]: Adding client connection <NSXPCConnection: 0x7fc6a1c10c60> connection from pid 542
Sep 6 20:37:49 localhost Unknown[517]:
Sep 6 20:37:49 Disk Utility[542] <Error>: CGColorSpaceCreateWithName failed for kCGColorSpaceITUR_709
Sep 6 20:37:49 localhost Unknown[517]:
Sep 6 20:37:49 Disk Utility[542] <Error>: CGColorSpaceCreateWithName failed for kCGColorSpaceITUR_2020
Sep 6 20:37:49 localhost Unknown[517]:
Sep 6 20:37:49 Disk Utility[542] <Error>: CGColorSpaceCreateWithName failed for kCGColorSpaceROMMRGB
Sep 6 20:37:51 localhost Unknown[517]: 2017-09-06 20:37:51.930 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk19 Mount point: /private/var/tmp/RecoveryTemp Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:51 localhost Unknown[517]: 2017-09-06 20:37:51.930 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk14 Mount point: Not Mounted Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:51 localhost Unknown[517]: 2017-09-06 20:37:51.930 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk8 Mount point: /private/var/run Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:51 localhost Unknown[517]: 2017-09-06 20:37:51.931 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk16 Mount point: /Library/Preferences Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:51 localhost Unknown[517]: 2017-09-06 20:37:51.931 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk20 Mount point: /private/var/tmp/InstallerCookies Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:51 localhost Unknown[517]: 2017-09-06 20:37:51.931 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk11 Mount point: /private/var/db Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:51 localhost Unknown[517]: 2017-09-06 20:37:51.931 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk18 Mount point: /Library/Keychains Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:51 localhost Unknown[517]: 2017-09-06 20:37:51.932 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk7 Mount point: /private/var/tmp Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:51 localhost Unknown[517]: 2017-09-06 20:37:51.934 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk13 Mount point: /private/var/root/Library Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:51 localhost Unknown[517]: 2017-09-06 20:37:51.936 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk6 Mount point: /Volumes Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:51 localhost Unknown[517]: 2017-09-06 20:37:51.936 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk15 Mount point: /private/var/root/Library/Containers Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:51 localhost Unknown[517]: 2017-09-06 20:37:51.936 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk10 Mount point: /System/Installation Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:51 localhost Unknown[517]: 2017-09-06 20:37:51.937 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk5 Mount point: /private/var/log Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:51 localhost Unknown[517]: 2017-09-06 20:37:51.937 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk17 Mount point: /Library/Preferences/SystemConfiguration Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:51 localhost Unknown[517]: 2017-09-06 20:37:51.939 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk12 Mount point: /private/var/folders Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:51 localhost Unknown[517]: 2017-09-06 20:37:51.939 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk9 Mount point: /private/tmp Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:53 localhost Disk Utility[542]: Connected to daemon. Language set to: Italian
Sep 6 20:37:53 localhost Disk Utility[542]: Connected to daemon. Language set to: Italian
Sep 6 20:37:53 localhost Unknown[517]: 2017-09-06 20:37:53.593 Disk Utility[542:22472] Connected to daemon. Language set to: Italian
Sep 6 20:37:53 localhost Unknown[517]: 2017-09-06 20:37:53.594 Disk Utility[542:22470] Connected to daemon. Language set to: Italian
Sep 6 20:37:53 localhost Unknown[517]: 2017-09-06 20:37:53.745 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk19 Mount point: /private/var/tmp/RecoveryTemp Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:53 localhost Unknown[517]: 2017-09-06 20:37:53.746 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk14 Mount point: Not Mounted Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:53 localhost Unknown[517]: 2017-09-06 20:37:53.747 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk8 Mount point: /private/var/run Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:53 localhost Unknown[517]: 2017-09-06 20:37:53.747 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk16 Mount point: /Library/Preferences Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:53 localhost Unknown[517]: 2017-09-06 20:37:53.748 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk20 Mount point: /private/var/tmp/InstallerCookies Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:53 localhost Unknown[517]: 2017-09-06 20:37:53.748 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk11 Mount point: /private/var/db Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:53 localhost Unknown[517]: 2017-09-06 20:37:53.749 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk18 Mount point: /Library/Keychains Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:53 localhost Unknown[517]: 2017-09-06 20:37:53.762 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk7 Mount point: /private/var/tmp Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:53 localhost Unknown[517]: 2017-09-06 20:37:53.763 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk13 Mount point: /private/var/root/Library Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:53 localhost Unknown[517]: 2017-09-06 20:37:53.763 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk6 Mount point: /Volumes Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:53 localhost Unknown[517]: 2017-09-06 20:37:53.764 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk15 Mount point: /private/var/root/Library/Containers Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:53 localhost Unknown[517]: 2017-09-06 20:37:53.764 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk10 Mount point: /System/Installation Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:53 localhost Unknown[517]: 2017-09-06 20:37:53.765 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk5 Mount point: /private/var/log Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:53 localhost Unknown[517]: 2017-09-06 20:37:53.766 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk17 Mount point: /Library/Preferences/SystemConfiguration Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:53 localhost Unknown[517]: 2017-09-06 20:37:53.766 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk12 Mount point: /private/var/folders Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:37:53 localhost Unknown[517]: 2017-09-06 20:37:53.767 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk9 Mount point: /private/tmp Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.084 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk19 Mount point: /private/var/tmp/RecoveryTemp Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.084 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk14 Mount point: Not Mounted Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.085 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk8 Mount point: /private/var/run Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.086 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk16 Mount point: /Library/Preferences Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.087 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk20 Mount point: /private/var/tmp/InstallerCookies Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.087 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk11 Mount point: /private/var/db Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.088 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk18 Mount point: /Library/Keychains Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.088 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk7 Mount point: /private/var/tmp Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.089 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk13 Mount point: /private/var/root/Library Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.090 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk6 Mount point: /Volumes Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.090 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk15 Mount point: /private/var/root/Library/Containers Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.091 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk10 Mount point: /System/Installation Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.092 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk5 Mount point: /private/var/log Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.092 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk17 Mount point: /Library/Preferences/SystemConfiguration Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.093 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk12 Mount point: /private/var/folders Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.093 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk9 Mount point: /private/tmp Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost diskmanagementd[539]: DM ->T-[DMToolPartitionDisk changeGUIDKeysToPartIDKeys:forDictionary:]: inPartitionsArr=(
{
Flags = 1;
GUID = "A5B3DC78-43BA-41F1-8F89-E405CCE5657B";
Name = "EFI System Partition";
Offset = 40;
"Partition ID" = 1;
Size = 409600;
Type = EFI;
},
{
Flags = 9;
GUID = "93E42119-12BC-4223-AD0E-DCCD776F20C8";
Offset = 409640;
"Partition ID" = 2;
Size = 233769824;
Type = "Apple_HFS";
}
) inoutDict(bef)={
"93E42119-12BC-4223-AD0E-DCCD776F20C8" = {
Erase = 0;
Existed = 0;
FilesystemName = "Journaled HFS+";
Name = "Macintosh HD SSD";
Newfs = 1;
Size = 0;
};
}

Sep 6 20:39:14 localhost diskmanagementd[539]: DM ..T-[DMToolPartitionDisk changeGUIDKeysToPartIDKeys:forDictionary:]: listOfKeys=(
"93E42119-12BC-4223-AD0E-DCCD776F20C8"
)

Sep 6 20:39:14 localhost diskmanagementd[539]: DM ..T-[DMToolPartitionDisk changeGUIDKeysToPartIDKeys:forDictionary:]: . k=93E42119-12BC-4223-AD0E-DCCD776F20C8 p={
Flags = 9;
GUID = "93E42119-12BC-4223-AD0E-DCCD776F20C8";
Offset = 409640;
"Partition ID" = 2;
Size = 233769824;
Type = "Apple_HFS";
}

Sep 6 20:39:14 localhost diskmanagementd[539]: DM ..T-[DMToolPartitionDisk changeGUIDKeysToPartIDKeys:forDictionary:]: . CHANGING KEY: old=93E42119-12BC-4223-AD0E-DCCD776F20C8 new=2

Sep 6 20:39:14 localhost diskmanagementd[539]: DM <-T-[DMToolPartitionDisk changeGUIDKeysToPartIDKeys:forDictionary:]: retVal=0 inoutDict(aft)={
2 = {
Erase = 0;
Existed = 0;
FilesystemName = "Journaled HFS+";
Name = "Macintosh HD SSD";
Newfs = 1;
Size = 0;
};
}

Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.807 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk19 Mount point: /private/var/tmp/RecoveryTemp Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.808 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk14 Mount point: Not Mounted Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.809 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk8 Mount point: /private/var/run Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.809 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk16 Mount point: /Library/Preferences Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.810 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk20 Mount point: /private/var/tmp/InstallerCookies Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.811 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk11 Mount point: /private/var/db Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.811 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk18 Mount point: /Library/Keychains Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.812 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk7 Mount point: /private/var/tmp Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.813 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk13 Mount point: /private/var/root/Library Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.813 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk6 Mount point: /Volumes Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.814 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk15 Mount point: /private/var/root/Library/Containers Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.815 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk10 Mount point: /System/Installation Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.815 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk5 Mount point: /private/var/log Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.816 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk17 Mount point: /Library/Preferences/SystemConfiguration Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.817 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk12 Mount point: /private/var/folders Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:14 localhost Unknown[517]: 2017-09-06 20:39:14.818 Disk Utility[542:22373] Failed to get physical whole disk: SKDisk { BSD Name: disk9 Mount point: /private/tmp Role: kSKDiskRoleLegacyMacData Type: kSKDiskTypeHFS }
Sep 6 20:39:17 localhost diskmanagementd[539]: DM ->T-[DMToolBootPreference updateBootIniFileOnDisk:newPartNum:doIt:appropriate:exists:able:needsUpdate:ensuredIt:hadToWrite:]: inDisk=0x700001a8f7b0=disk0s1=EFI inNewPartNum=1 inDoIt=1
Sep 6 20:39:17 localhost diskmanagementd[539]: DM <-T-[DMToolBootPreference updateBootIniFileOnDisk:newPartNum:doIt:appropriate:exists:able:needsUpdate:ensuredIt:hadToWrite:]: retErr=0 outApt=0 outExists=0 outAble=0 outNeedsUpdate=0 outEnsuredIt=0 outHadToWrite=0
Sep 6 20:39:17 localhost diskmanagementd[539]: DM ->T-[DMToolBootPreference updateBootIniFileOnDisk:newPartNum:doIt:appropriate:exists:able:needsUpdate:ensuredIt:hadToWrite:]: inDisk=0x700001a8f7b0=disk0s2=Macintosh HD SSD inNewPartNum=2 inDoIt=1
Sep 6 20:39:17 localhost diskmanagementd[539]: DM <-T-[DMToolBootPreference updateBootIniFileOnDisk:newPartNum:doIt:appropriate:exists:able:needsUpdate:ensuredIt:hadToWrite:]: retErr=0 outApt=0 outExists=0 outAble=0 outNeedsUpdate=0 outEnsuredIt=0 outHadToWrite=0
Sep 6 20:39:17 localhost storagekitd[543]: Erase Complete, Mount Point: (null)
Sep 6 20:39:17 localhost storagekitd[543]: Recache Complete, Mount Point: (null)
Sep 6 20:40:39 localhost storagekitd[543]: Erase Complete, Mount Point: /Volumes/Macintosh HD SSD
Sep 6 20:40:40 localhost storagekitd[543]: Recache Complete, Mount Point: /Volumes/Macintosh HD SSD
Sep 6 20:40:59 localhost Unknown[517]: Connected to daemon. Language set to: Italian
Sep 6 20:40:59 localhost Unknown[517]: Connected to daemon. Language set to: Italian
Sep 6 20:40:59 localhost storagekitd[543]: Removing client connection <SKDaemonConnection: 0x7fc6a1c121a0>
Sep 6 20:40:59 localhost storagekitd[543]: No more connections, storagekitd will exit...
Sep 6 20:41:14 localhost powerd[152]: Assertion Released. Type:PreventUserIdleSystemSleep Name:'com.apple.diskmanagementd' Id:0x100008002 Process:diskmanagementd [System: DeclUser kDisp]
Sep 6 20:42:24 localhost InstallAssistant_springboard[570]: Springboarding to: /Volumes/Image Volume/Install macOS Sierra.app/Contents/MacOS/InstallAssistant
Sep 6 20:42:24 localhost InstallAssistant_springboard[570]: argv[0]: InstallAssistant
Sep 6 20:42:24 localhost InstallAssistant_springboard[570]: argv[1]: -NSDisabledCharacterPaletteMenuItem
Sep 6 20:42:24 localhost InstallAssistant_springboard[570]: argv[2]: YES
Sep 6 20:42:24 localhost InstallAssistant_springboard[570]: argv[3]: -AppleKeyboardUIMode
Sep 6 20:42:24 localhost InstallAssistant_springboard[570]: argv[4]: 2
Sep 6 20:42:24 localhost InstallAssistant_springboard[570]: argv[5]: -AppleLanguages
Sep 6 20:42:24 localhost InstallAssistant_springboard[570]: argv[6]: (it)
Sep 6 20:42:24 localhost InstallAssistant_springboard[570]: argv[7]: -RunInOSIEnv
Sep 6 21:23:12 localhost powerd[152]: Assertion TimedOut. Type:InternalPreventSleep Name:'com.apple.powermanagement.acwakelinger' Id:0xd0000800c Process:powerd [System: DeclUser SRPrevSleep kCPU kDisp]
Sep 6 21:23:17 localhost Unknown[517]: 2017-09-06 21:23 macOS Utilities[537] (FSEvents.framework) FSEventStreamStart: ERROR: FSEvents_connect() => Unknown service name (1102)
Sep 6 21:24:49 localhost opendirectoryd[165]: 619.2 - Client: ReportCrash, UID: 0, EUID: 0, GID: 0, EGID: 0
Sep 6 21:24:49 localhost opendirectoryd[165]: 619.2 - ODNodeCreateWithNameAndOptions request, SessionID: 00000000-0000-0000-0000-000000000000, Name: /Local/Default, Options: 0x0
Sep 6 21:24:49 localhost opendirectoryd[165]: 619.2 - loading configuration for '/Local' from '/System/Library/OpenDirectory/Configurations/Local.plist'
Sep 6 21:24:50 localhost opendirectoryd[165]: Loaded bundle at path '/System/Library/OpenDirectory/Modules/PlistFile.bundle'
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.2 - unable to find authentication module 'AppleID'
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.2 - unable to find service discovery callback for module 'PlistFile'
Sep 6 21:24:50 localhost opendirectoryd[165]: Registering for network changes
Sep 6 21:24:50 localhost opendirectoryd[165]: Registered subnode with name '/Local/Default'
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.2.3 - Block: nodestate '/Local/Default'
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.2.3, Module: PlistFile - Node is 10.7 or later
Sep 6 21:24:50 localhost opendirectoryd[165]: Registering for power changes
Sep 6 21:24:50 localhost opendirectoryd[165]: Registering for network power changes
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.2.3 - nodestate - flagging '/Local/Default' online
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.2.3 - Block completed
Sep 6 21:24:50 localhost opendirectoryd[165]: 165.4 - Block: nodestate '/Local'
Sep 6 21:24:50 localhost opendirectoryd[165]: 165.4 - nodestate - flagging '/Local' online
Sep 6 21:24:50 localhost opendirectoryd[165]: 165.4 - Block completed
Sep 6 21:24:50 localhost opendirectoryd[165]: 165.5 - ODNodeCreateWithNameAndOptions request, SessionID: 00000000-0000-0000-0000-000000000000, Name: /Local/Default, Options: 0x0
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.2, Node: /Local/Default - node assigned UUID - CBFAA63B-0261-4CF0-8271-1823BBCC03D9
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.2, Node: /Local/Default - ODNodeCreateWithNameAndOptions completed
Sep 6 21:24:50 localhost opendirectoryd[165]: 165.5, Node: /Local/Default - node assigned UUID - 6EF3F470-EB78-4E65-8161-A87BE190AA0B
Sep 6 21:24:50 localhost opendirectoryd[165]: 165.5, Node: /Local/Default - ODNodeCreateWithNameAndOptions completed
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.7 - Client: ReportCrash, UID: 0, EUID: 0, GID: 0, EGID: 0
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.7 - ODNodeCopyDetails request, NodeID: CBFAA63B-0261-4CF0-8271-1823BBCC03D9, Keys: dsAttrTypeStandard:NodePath
Sep 6 21:24:50 localhost opendirectoryd[165]: 165.6, Module: PlistFile - ODQueryCreateWithNode request, NodeID: 6EF3F470-EB78-4E65-8161-A87BE190AA0B, RecordType(s): dsRecTypeStandard:Config, Attribute: dsAttrTypeStandard:RecordName, MatchType: EqualTo, Equality: CaseIgnore, Value(s): CIFSServer, Requested Attributes: dsAttrTypeStandard:XMLPlist,dsAttrTypeStandard:RecordName,dsAttrTypeStandard:RecordType, Max Results: 1
Sep 6 21:24:50 localhost opendirectoryd[165]: 165.6, Node: /Local/Default, Module: PlistFile - ODQueryCreateWithNode completed
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.7, Node: /Local/Default, Module: PlistFile - ODNodeCopyDetails completed, delivered 1 result
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.8 - Client: ReportCrash, UID: 0, EUID: 0, GID: 0, EGID: 0
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.8 - ODNodeRelease request, NodeID: CBFAA63B-0261-4CF0-8271-1823BBCC03D9
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.8, Node: /Local/Default - ODNodeRelease completed
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.9 - Client: ReportCrash, UID: 0, EUID: 0, GID: 0, EGID: 0
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.9 - ODNodeCreateWithNameAndOptions request, SessionID: 00000000-0000-0000-0000-000000000000, Name: /Search, Options: 0x0
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.9 - ODNodeCreateWithNameAndOptions failed with error 'Unknown node name' (2000)
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.10 - Client: ReportCrash, UID: 0, EUID: 0, GID: 0, EGID: 0
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.10 - ODNodeCreateWithNameAndOptions request, SessionID: 00000000-0000-0000-0000-000000000000, Name: /Search, Options: 0x0
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.10 - ODNodeCreateWithNameAndOptions failed with error 'Unknown node name' (2000)
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.11 - Client: ReportCrash, UID: 0, EUID: 0, GID: 0, EGID: 0
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.11 - ODNodeCreateWithNameAndOptions request, SessionID: 00000000-0000-0000-0000-000000000000, Name: /Local/Default, Options: 0x0
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.11, Node: /Local/Default - node assigned UUID - 73157AF2-E102-4188-BEAF-24A46E80B9E6
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.11, Node: /Local/Default - ODNodeCreateWithNameAndOptions completed
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.12 - Client: ReportCrash, UID: 0, EUID: 0, GID: 0, EGID: 0
Sep 6 21:24:50 localhost opendirectoryd[165]: 619.12 - ODQueryCreateWithNode request, NodeID: 73157AF2-E102-4188-BEAF-24A46E80B9E6, RecordType(s): dsRecTypeStandard:Users, Attribute: dsAttrTypeStandard:RecordName, MatchType: Any, Equality: CaseIgnore, Value(s): dsRecordsAll, Requested Attributes: dsAttrTypeStandard:GeneratedUID,dsAttrTypeNative:LinkedIdentity,dsAttrTypeStandard:RealName,dsAttrTypeStandard:GroupMembership,dsAttrTypeNative:IsHidden,dsAttrTypeStandard:Picture,dsAttrTypeStandard:UserCertificate,dsAttrTypeStandard:AppleMetaNodeLocation,dsAttrTypeStandard:RecordType,dsAttrTypeStandard:Comment,dsAttrTypeStandard:NestedGroups,dsAttrTypeStandard:PrimaryGroupID,dsAttrTypeStandard:AuthenticationAuthority,dsAttrTypeStandard:Keywords,dsAttrTypeStandard:RecordName,dsAttrTypeStandard:JPEGPhoto,dsAttrTypeNative:_guest,dsAttrTypeStandard:AppleMetaRecordName,dsAttrTypeStandard:UserShell,dsAttrTypeStandard:GroupMembers,dsAttrTypeStandard:UniqueID,dsAttrTypeStandard:EMailAddress,dsAttrTypeStandard:NFSHomeDirectory, Max Results: 2147483647
Sep 6 21:24:51 localhost opendirectoryd[165]: 619.12, Node: /Local/Default, Module: PlistFile - ODQueryCreateWithNode completed, delivered 93 results
Sep 6 21:24:51 localhost opendirectoryd[165]: 619.13 - Client: ReportCrash, UID: 0, EUID: 0, GID: 0, EGID: 0
Sep 6 21:24:51 localhost opendirectoryd[165]: 619.13 - ODNodeRelease request, NodeID: 73157AF2-E102-4188-BEAF-24A46E80B9E6
Sep 6 21:24:51 localhost opendirectoryd[165]: 619.13, Node: /Local/Default - ODNodeRelease completed
Sep 6 21:33:24 localhost powerd[152]: Assertion TimedOut. Type:UserIsActive Name:'com.apple.iohideventsystem.queue.tickle.4294968600.17' Id:0x90000800b Process:hidd [System: DeclUser kDisp]
Sep 6 21:33:25 localhost powerd[152]: Display is turned off
Sep 6 21:33:25 localhost powerd[152]: Assertion Summary. Type:ExternalMedia Name:'com.apple.powermanagement.externalmediamounted' Id:0x800008000 Process:powerd [System: No Assertions]
Sep 6 21:33:39 localhost powerd[152]: Assertion Created. Type:InternalPreventSleep Name:'com.apple.powermanagement.darkwakelinger' Id:0xd0000800d Process:powerd [System: SRPrevSleep kCPU]
Sep 6 21:33:54 localhost powerd[152]: Assertion TimedOut. Type:InternalPreventSleep Name:'com.apple.powermanagement.darkwakelinger' Id:0xd0000800d Process:powerd [System: SRPrevSleep kCPU]
Sep 6 21:33:54 localhost powerd[152]: Entering Sleep state due to 'Idle Sleep': battCap: pwrSrc: AC
Sep 6 21:33:54 localhost opendirectoryd[165]: Received power notification - disabling network activity
Sep 6 21:46:04 localhost opendirectoryd[165]: Received power notification - enabling network activity
Sep 6 21:46:04 localhost powerd[152]: Assertion Created. Type:MaintenanceWake Name:'mDNSResponder:maintenance' Id:0xd0000800e Process:mDNSResponder [System: SRPrevSleep kCPU]
Sep 6 21:46:04 localhost powerd[152]: Display is turned on
Sep 6 21:46:04 localhost powerd[152]: Assertion Created. Type:UserIsActive Name:'com.apple.iohideventsystem.queue.tickle.4294968656.3' Id:0x90000800f Process:hidd [System: DeclUser SRPrevSleep kCPU kDisp]
Sep 6 21:46:06 localhost powerd[152]: Assertion Released. Type:MaintenanceWake Name:'mDNSResponder:maintenance' Id:0xd0000800e Process:mDNSResponder [System: DeclUser kDisp]
Sep 6 21:46:09 localhost powerd[152]: Wake from Normal Sleep [CDNVA] due to OHC2/HID Activity:
battCap: pwrSrc: AC
Sep 6 21:46:09 localhost powerd[152]: Assertion Created. Type:InternalPreventSleep Name:'com.apple.powermanagement.acwakelinger' Id:0xd00008010 Process:powerd [System: DeclUser SRPrevSleep kCPU kDisp]
Sep 6 21:46:09 localhost opendirectoryd[165]: Received power notification (system has powered on)
Sep 6 21:46:54 localhost powerd[152]: Assertion TimedOut. Type:InternalPreventSleep Name:'com.apple.powermanagement.acwakelinger' Id:0xd00008010 Process:powerd [System: DeclUser SRPrevSleep kCPU kDisp]
Sep 6 21:48:36 localhost Unknown[517]: 2017-09-06 21:48 macOS Utilities[537] (FSEvents.framework) FSEventStreamStart: ERROR: FSEvents_connect() => Unknown service name (1102)

Grazie.

[fragrua]

L'installer di macOS che hai usato (chiavetta suppongo) è stato scaricato "fresco" da Mac App Store oppure c'è il rischio che i certificati siano scaduti?

[lupetto-]

Ciao fragrua grazie per avermi risposto, Si ho creato una chiavetta USB con sistema operativo Sierra scaricato dall`App Store. Come ho gia` scritto su ho provato anche da DVD con il vecchio sistema operativo in dotazione all`iMac credo che sia Mountain Lion ma sempre la stessa risposta.

[faxus]

A mio parere...

Reimposta la NVRAM
https://support.apple.com/it-it/HT204063" onclick="window.open(this.href);return false;

Ripara il disco (ripeti due o tre volte la riparazione)

Poi ripeti l'installazione

[lupetto-]

Ok, grazie faxus. Provero` a reimpostare la NVRAM e riparare il disco come mi hai consigliato. Poi ripetero`per l`ennesima volta l`installazione speriamo bene ciao.

[lupetto-]

Buongiorno, allora ho reimpostato la NVRAM, riparato il disco ma adesso dopo l`installazione del sistema operative "Sierra" ho ricevuto un`altro messeggio di errore "Il payload del programma di installazione ha riscontrato errori durante la verifica della firma" Leggendo qualche altra discussione in merito a questo errore qua nel forum, ho letto che l`errore e' dovuto all'impostazione sbagliata della data. Allora mi chiedevo se la causa di tutti i miei problemi potrebbero essere causati dalla batteria del bios scarica. Cosa ne pensate? Grazie sempre per il vostro aiuto.

[faxus]

... mi chiedevo se la causa di tutti i miei problemi potrebbero essere causati dalla batteria...

Può essere, anche se è un'eventualità rara nei Mac moderni.

Hai provato ad impostare una data da Terminale?
Come hai trovato nei post che hai letto

[lupetto-]

Tra questa sera al Massimo domani provo. Grazie.

[lupetto-]

Salve, RISOLTOOO!!! Grazie a faxus e Frag®ua, seguendo i vostri consigli sono riuscito a fare ripartire il mio iMac da cui ora vi sto scrivendo.
Grazie di nuovo per la vostra saggezza e disponibilità. Un saluto a tutto il forum.