"Failed to prepare the software update" when trying to update from Sonoma 14.4.1 to 14.5
Things I already tried:
- Shutdown / restart the Mac
- Boot into safe mode and then try to update
- Disk check "First Aid"
- Manually update using terminal, which yields this error message:
sudo softwareupdate -i -a
Software Update Tool
Finding available software
Downloading macOS Sonoma 14.5
Downloading: 100.00%
Failed to download & prepare update: Error Domain=SUOSUErrorDomain Code=201 "Failed to prepare the software update. Please try again." UserInfo={NSLocalizedRecoverySuggestion=An error occurred while downloading the selected updates. Please check your internet connection and try again., NSLocalizedDescription=Failed to prepare the software update. Please try again., NSUnderlyingError=0x600003f50000 {Error Domain=SUMacControllerError Code=7740 "[SUMacControllerErrorPrepareFailed=7740] Failed to perform Prepare operation: [MobileSoftwareUpdateErrorDomain(MSU):MSU_ERR_BRIDGEOS_PREPARE_FAILURE(45)_1_BOSErrorDomain:205_2_BridgeOSSoftwareUpdateError:19]" UserInfo={NSLocalizedDescription=Failed to prepare the software update. Please try again., SUMacControllerErrorIndicationsMask=0, NSDebugDescription=[SUMacControllerErrorPrepareFailed=7740] Failed to perform Prepare operation: [MobileSoftwareUpdateErrorDomain(MSU):MSU_ERR_BRIDGEOS_PREPARE_FAILURE(45)_1_BOSErrorDomain:205_2_BridgeOSSoftwareUpdateError:19], NSUnderlyingError=0x600003f52370 {Error Domain=MobileSoftwareUpdateErrorDomain Code=45 "bridgeOS prepare failed" UserInfo={NSUnderlyingError=0x600003f52400 {Error Domain=BOSErrorDomain Code=205 "An error occurred during prepare." UserInfo=0x600002451280 (not displayed)}, NSLocalizedDescription=bridgeOS prepare failed, target_update=23F79}}}}}
The download gets stuck at 65% and it stays there for about 5 minutes and then this error message comes.
My internet connection is fine and everything works well except this update.
Spec:
Intel iMac Retina 5K, 27-inch, 2020
Any ideas how to solve this problem? Thanks.
iMac (2017 – 2020)