si blocca in continuazione e spegne

[espana]

EtreCheck version: 3.4.6 (460)
Report generated 2018-01-14 20:14:00
Download EtreCheck from https://etrecheck.com" onclick="window.open(this.href);return false;
Runtime: 2:37
Performance: Excellent

Click the [Lookup] links for more information from Apple Support Communities.
Click the [Details] links for more information about that line.

Problem: No problem - just checking

Hardware Information: ⓘ
iMac (21.5-inch, Mid 2011)
[Technical Specifications] - [User Guide] - [Warranty & Service]
iMac - model: iMac12,1
1 2,5 GHz Intel Core i5 (i5-2400S) CPU: 4-core
8 GB RAM Upgradeable - [Instructions]
BANK 0/DIMM0
2 GB DDR3 1333 MHz ok
BANK 1/DIMM0
2 GB DDR3 1333 MHz ok
BANK 0/DIMM1
4 GB DDR3 1333 MHz ok
BANK 1/DIMM1
Empty
Handoff/Airdrop2: not supported
Wireless: en1: 802.11 a/b/g/n
iCloud Quota: 5.00 GB available

Video Information: ⓘ
AMD Radeon HD 6750M - VRAM: 512 MB
iMac 1920 x 1080

Disk Information: ⓘ
WDC WD10EZEX-08WN4A0 disk0: (1 TB) (Rotational)
[Show SMART report]
(disk0s1) <not mounted> [partition_map]: 32 KB
Hard disk (disk0s3 - Journaled HFS+) / [Startup]: 1.00 TB (962.81 GB free)

HL-DT-STDVDRW GA32N ()

USB Information: ⓘ
USB20Bus
hub_device
Apple Computer, Inc. IR Receiver
Apple Card Reader
USB20Bus
Apple Inc. FaceTime HD Camera (Built-in)
hub_device
Apple Inc. BRCM2046 Hub
Apple Inc. Bluetooth USB Host Controller

Thunderbolt Information: ⓘ
Apple Inc. thunderbolt_bus

System Software: ⓘ
macOS Sierra 10.12.6 (16G1114) - Time since boot: about 3 hours

Configuration files: ⓘ
System Integrity Protection status: disabled

Gatekeeper: ⓘ
Mac App Store and identified developers

System Launch Agents: ⓘ
[not loaded] 7 Apple tasks
[loaded] 176 Apple tasks
[running] 102 Apple tasks

System Launch Daemons: ⓘ
[not loaded] 42 Apple tasks
[loaded] 175 Apple tasks
[running] 100 Apple tasks

Launch Daemons: ⓘ
[loaded] com.microsoft.office.licensingV2.helper.plist (Microsoft Corporation - installed 2015-08-15) [Lookup]
[running] com.surteesstudios.hddfancontroldaemon.plist (? 750580a6 93a15b16 - installed 2014-09-15) [Lookup]

User Login Items: ⓘ
Garmin Express Service Applicazione (Garmin International - installed 2018-01-14)
(/Applications/Garmin Express.app/Contents/Library/LoginItems/Garmin Express Service.app)
iTunesHelper Applicazione (? 0 - installed 2018-01-13)
(/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)

Internet Plug-ins: ⓘ
QuickTime Plugin: 7.7.3 (installed 2018-01-13)

3rd Party Preference Panes: ⓘ
HDD Fan Control (installed 2018-01-13) [Lookup]

Time Machine: ⓘ
Time Machine not configured!

Top Processes by CPU: ⓘ
27% firefox
19% storedownloadd
14% plugin-container
8% WindowServer
8% kernel_task

Top Processes by Memory: ⓘ
682 MB kernel_task
484 MB firefox
336 MB plugin-container
235 MB plugin-container
202 MB mds_stores

Top Processes by Network Use: ⓘ
Input Output Process name
1.94 GB 601 B storedownloadd
390 KB 119 KB mDNSResponder
58 KB 11 KB netbiosd
5 KB 22 KB assistantd
14 KB 9 KB firefox

Top Processes by Energy Use: ⓘ
17.66 storedownloadd
10.68 plugin-container
9.40 WindowServer
6.88 firefox

Virtual Memory Information: ⓘ
3.82 GB Available RAM
25 MB Free RAM
4.18 GB Used RAM
3.80 GB Cached files
34 MB Swap Used

Software installs (last 30 days): ⓘ
HDD Fan Control: (installed 2018-01-13)
HDD Fan Control: (installed 2018-01-13)
HDD Fan Control: (installed 2018-01-13)
HDD Fan Control: (installed 2018-01-13)
The Unarchiver: 3.11.3 (installed 2018-01-13)
UnRAR Unarchiver - Zip, Rar Extractor,Expander: 1.1 (installed 2018-01-13)
iFototessere: 4.1.0 (installed 2018-01-13)
CloudApp: 4.3.3 (installed 2018-01-13)
Garmin Express: (installed 2018-01-14)
2048 Game: 1.5 (installed 2018-01-14)
Microsoft Office 2016 per Mac: (installed 2018-01-14)
CleanMyDrive 2: 2.1.11 (installed 2018-01-14)
Printer Driver: (installed 2018-01-14)
Microsoft Office 2016 per Mac: (installed 2018-01-14)

Install information may not be complete.

Diagnostics Events (last 3 days for minor events): ⓘ
2018-01-14 19:30:28 Microsoft AutoUpdate.app Crash [Open]
2018-01-14 19:30:15 syncdefaultsd Crash [Open]
Cause: dyld: launch, running initializers
/usr/lib/libSystem.B.dylib
2018-01-14 19:29:35 update_dyld_shared_cache Crash [Open]
2018-01-14 19:16:10 sandboxd Crash [Open]
Cause: create_symbol_owner_data -- UUID: 2A8C9B80-E632-38BC-AA80-371F2A4F10CE, Path: /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit, DSYM Path: <none>, is_dyld_shared_cache: Yes
2018-01-14 19:06:41 Microsoft Excel.app Hang [Open]
2018-01-14 17:37:57 XprotectService Crash [Open]
Cause: abort() called
*** error for object 0x7fed3b002200: incorrect checksum for freed object - object was probably modified after being freed.
2018-01-14 17:10:55 Last shutdown cause: 0 - Power loss
2018-01-14 17:08:33 storeaccountd Crash [Open]
2018-01-14 17:08:32 NotificationCenter.app Crash [Open]
2018-01-14 17:08:29 fmfd Crash [Open]
2018-01-14 17:08:28 SystemUIServer.app Crash [Open]
2018-01-14 17:07:57 AppleIDAuthAgent Crash [Open]
2018-01-14 17:07:49 mds_stores Crash [Open]
Cause: [0x7000064eb000] reverseStoreUpdateState err:-1
[0x7000064eb000] update state (1) failed err:-1
[0x7000064eb000] error (2) opening reverseDirectoryStore.shadow
2018-01-14 17:07:30 App Store.app Hang [Open]
2018-01-14 17:06:37 CalendarAgent Crash [Open]
2018-01-14 17:06:12 AddressBookSourceSync.app Crash [Open]
2018-01-14 17:06:04 com.apple.CloudPhotosConfiguration Crash [Open]
2018-01-14 17:05:49 AOSHeartbeat.app Crash [Open]
2018-01-14 17:03:50 SecurityAgent Crash [Open]
2018-01-14 17:01:24 Installer Progress.app Crash [Open]
2018-01-14 16:22:45 Kernel Panic [Open] [Details]
3rd Party Kernel Extensions: None
2018-01-14 15:31:33 fontworker Crash [Open]
2018-01-14 14:58:37 Garmin Express.app Crash [Open]
2018-01-14 14:54:49 Finder.app Crash [Open]
Cause: Performing @selector(handleDoubleClick:) from sender TListView 0x7febc672a830
2018-01-14 14:52:45 Problem Reporter.app Crash [Open]
2018-01-14 14:52:42 System Preferences.app Crash [Open]
2018-01-14 14:51:57 cloudpaird Crash [Open]
2018-01-14 13:03:16 fud Crash [Open]
Cause: dyld: launch, loading dependent libraries
2018-01-14 09:02:35 bird Crash [Open]
2018-01-14 09:02:20 networkserviceproxy Crash [Open]
Cause: objc[242]: Method cache corrupted. This may be a message to an invalid object, or a memory error somewhere else.
objc[242]: receiver 0x7fa0b1e06ee0, SEL 0x7fff9030d05a, isa 0x103287de8, cache 0x103287df8, buckets 0x7fa0b1f05220, mask 0xf, occupied 0xa
objc[242]: receiver 384 bytes, buckets 272 bytes
objc[242]: selector 'release'
objc[242]: isa 'NSPAppRule'
2018-01-14 09:02:06 opendirectoryd Crash [Open]
2018-01-14 08:35:29 Installer.app Crash [Open]
Cause: objc_msgSend() selector name: retain
2018-01-13 23:50:15 Spotlight.app Crash [Open]
2018-01-13 23:15:32 com.apple.WebKit.WebContent Crash [Open]
2018-01-13 22:56:46 Dock.app Crash [Open]
Cause: /Library/Widgets/Weather.wdgt
2018-01-13 22:43:43 quicklookd.app Crash [Open]
Cause: qlmanage --diag 6571367.474531 6571367.474619 6571367.474585 6571367.474507 6571367.474483 6571367.474604 6571367.474428 6571367.474499 6571367.474475 6571367.474439 6571367.474537 6571367.474451 6571367.474457 6571367.474416 6571367.474495 6571367.474763 6571367.474592 6571367.474545 6571367.475081 6571367.474597 6571367.474411 6571367.474525 6571367.474423 6571367.474515 6571367.474470 6571367.474609 6571367.474613 6571367.474520 6571367.474709 6571367.474518 6571367.474489 6571367.474464 6571367.474422
last generator in main thread: com.apple.qlgenerator.web
last threaded generator: com.apple.qlgenerator.image
2018-01-13 22:33:55 nsurlstoraged Crash [Open]
2018-01-13 22:30:28 HDD Fan Control Monitor.app Crash [Open]
2018-01-13 22:21:12 WindowServer Crash [Open]
2018-01-13 22:21:10 xpcproxy Crash [Open]
Cause: BUG IN LIBPLATFORM: ulock_wait failure
2018-01-13 22:08:00 JDownloader2.app High CPU use [Open] [Details]
2018-01-13 21:47:58 logd Crash [Open]
Cause: abort() called
*** error for object 0x7f8d5f56d328: incorrect checksum for freed object - object was probably modified after being freed.
2018-01-13 21:47:28 airportd Crash [Open]
2018-01-13 21:23:31 appleeventsd Crash [Open]
2018-01-13 21:23:08 Displays.prefPane Crash [Open]
Cause: Assertion failed: (tokenCount < maxCountIncludingZeroTerminator - 1), function CUIRenditionKeySetValueForAttribute, file /BuildRoot/Library/Caches/com.apple.xbs/Sources/CoreUI/CoreUI-431.3/CoreTheme/ThemeStorage/CUIThemeRendition_Support.m, line 343.
2018-01-13 19:24:29 SafariDAVClient Crash [Open]
Cause: dyld: launch, running initializers
/usr/lib/libSystem.B.dylib
2018-01-13 19:24:25 SafariBookmarksSyncAgent Crash [Open]
Cause: dyld: launch, running initializers
/usr/lib/libSystem.B.dylib
2018-01-13 19:14:53 com.apple.SafariServices Crash [Open]
Cause: dyld: launch, running initializers
/usr/lib/libSystem.B.dylib
2018-01-13 18:47:06 nbstated Crash [Open]
2018-01-13 18:11:31 Calendar.app Crash [Open]
Cause: dyld: launch, running initializers
/usr/lib/libSystem.B.dylib
2018-01-13 18:10:07 callservicesd Crash [Open]
2018-01-13 18:10:07 suggestd Crash [Open]
2018-01-13 18:10:05 soagent.app Crash [Open]
2018-01-13 18:10:04 sharingd Crash [Open]
2018-01-13 18:09:35 CalNCService Crash [Open]
2018-01-13 18:09:26 assistantd Crash [Open]
2018-01-13 18:09:19 ReportCrash Crash [Open]
Cause: Analyzing process: AddressBookSourceSync[335], path: /System/Library/Frameworks/AddressBook.framework/Versions/A/Helpers/AddressBookSourceSync.app/Contents/MacOS/AddressBookSourceSync; parent process: [1], path: /sbin/launchd
Analyzing process: sharingd[246], path: /usr/libexec/sharingd; parent process: [1], path: /sbin/launchd
Analyzing process: soagent[295], path: /System/Library/PrivateFrameworks/MessagesKit.framework/Versions/A/Resources/soagent.app/Contents/MacOS/soagent; parent process: [1], path: /sbin/launchd
2018-01-13 18:09:17 secinitd Crash [Open]
Cause: abort() called
*** error for object 0x7fe5b302bc00: incorrect checksum for freed object - object was probably modified after being freed.
2018-01-13 18:09:02 usbmuxd Crash [Open]
Cause: dyld: launch, running initializers
/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
2018-01-13 17:56:30 mtmd Crash [Open]
Cause: dyld: launch, loading dependent libraries
2018-01-13 17:35:10 CVMCompiler Crash [Open]
2018-01-13 16:52:58 Firefox.app Crash [Open]
2018-01-13 16:22:17 ProtectedCloudKeySyncing Crash [Open]
Cause: *** __CFTypeCollectionRetain() called with NULL; likely a collection has been corrupted ***
2018-01-13 09:59:36 UserEventAgent Crash [Open]
Cause: abort() called
*** error for object 0x7ff06950f018: incorrect checksum for freed object - object was probably modified after being freed.
2018-01-13 09:58:47 wdhelper Crash [Open]
Cause: dyld: launch, running initializers
/usr/lib/libSystem.B.dylib
BUG IN CLIENT OF LIBPLATFORM: os_unfair_lock is corrupt
2018-01-13 09:50:45 kextd Crash [Open]
2018-01-13 09:48:42 mds Crash [Open]
Cause: Initializing
2018-01-13 09:48:40 revisiond Crash [Open]
2018-01-13 09:48:38 findmydeviced Crash [Open]
2018-01-13 09:48:04 com.apple.geod Crash [Open]
Cause: dyld: launch, running initializers
/usr/lib/libSystem.B.dylib
Sandbox creation failed: Container object initialization failed.
You don’t have permission to save the file “Preferences” in the folder “Library”.
NSCocoaErrorDomain:513
2018-01-13 09:47:58 photoanalysisd Crash [Open]
Cause: dyld: launch, running initializers
/usr/lib/libSystem.B.dylib
Sandbox creation failed: Container object initialization failed.
You don’t have permission to save the file “Preferences” in the folder “Library”.
NSCocoaErrorDomain:513
2018-01-13 09:47:56 ctkahp Crash [Open]
Cause: dyld: launch, running initializers
/usr/lib/libSystem.B.dylib
Sandbox creation failed: Container object initialization failed.
You don’t have permission to save the file “Preferences” in the folder “Library”.
NSCocoaErrorDomain:513
2018-01-13 09:47:55 languageassetd Crash [Open]
Cause: dyld: launch, running initializers
/usr/lib/libSystem.B.dylib
Sandbox creation failed: Container object initialization failed.
You don’t have permission to save the file “Preferences” in the folder “Library”.
NSCocoaErrorDomain:513
2018-01-13 09:46:58 DataDetectorsSourceAccess Crash [Open]
2018-01-13 09:46:11 cloudphotosd.app Crash [Open]
Cause: dyld: launch, running initializers
/usr/lib/libSystem.B.dylib
Sandbox creation failed: Container object initialization failed.
You don’t have permission to save the file “Preferences” in the folder “Library”.
NSCocoaErrorDomain:513
2018-01-13 00:43:30 ditto Crash [Open]
2018-01-13 00:42:10 Software Update.app Crash [Open]
Cause: objc_msgSend() selector name: release

[Simone.m]

Sarebbe bello avere qualche dettaglio in più oltre al (disastroso) EtreCheck che hai postato.

La scheda video che hai è soggetta a guasti, potrebbe essere una causa.