Salut.
Déjà ton mac est bien un modèle iMac12.2 ?
Si tu as un doute revérifies avec la commande :
system_profiler SPHardwareDataType
Ensuite redémarre en mode Recovery et tape la commande :
diskutil repairdisk disk0
bash-3.2# system_profiler SPHardwareDataType
2017-10-17 08:58:36.604 system_profiler[443:9503] Error loading /System/Library/SystemProfiler/SPFirewallReporter.spreporter: Error Domain=NSCocoaErrorDomain Code=4 "The bundle “SPFirewallReporter.spreporter” couldn’t be loaded because its executable couldn’t be located." UserInfo=0x7fae33003e00 {NSLocalizedFailureReason=The bundle’s executable couldn’t be located., NSLocalizedRecoverySuggestion=Try reinstalling the bundle., NSBundlePath=/System/Library/SystemProfiler/SPFirewallReporter.spreporter, NSLocalizedDescription=The bundle “SPFirewallReporter.spreporter” couldn’t be loaded because its executable couldn’t be located.}
2017-10-17 08:58:36.624 system_profiler[443:9503] Error loading /System/Library/SystemProfiler/SPPrefPaneReporter.spreporter: Error Domain=NSCocoaErrorDomain Code=4 "The bundle “SPPrefPaneReporter.spreporter” couldn’t be loaded because its executable couldn’t be located." UserInfo=0x7fae31c37070 {NSLocalizedFailureReason=The bundle’s executable couldn’t be located., NSLocalizedRecoverySuggestion=Try reinstalling the bundle., NSBundlePath=/System/Library/SystemProfiler/SPPrefPaneReporter.spreporter, NSLocalizedDescription=The bundle “SPPrefPaneReporter.spreporter” couldn’t be loaded because its executable couldn’t be located.}
Hardware:
Hardware Overview:
Model Name: iMac
Model Identifier: iMac12,2
Processor Name: Intel Core i5
Processor Speed: 2.7 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 6 MB
Memory: 20 GB
Boot ROM Version: IM121.0047.B29
SMC Version (system): 1.72f2
Serial Number (system): C02FXEHDDHJP
Hardware UUID: F104B5B5-E1B7-5607-B6CB-F2951DC747C6
-bash-3.2#