![]() Looking at the logs, there were errors related to DLP and Defender which creates some issue with the upgraded disk Volume. upgrade completed but after last reboot, MacOS remained on 12.1. After a "delete and reinstall" they all now work fine.Ī less "Brutal" approach is also tried out (edit: which did not help) disabling various Defender modules, but this is rather time consuming since we do not know the result before the whole upgrade process is "complete". The same goes for other applications that were "corrupted" during the first tries. It occurred that we might have a compatibility issue with Defender ATP (101.56.35) - and after removing this application completely and retrying the OS upgrade, this was completed without any issues.ĭefender ATP was then reinstalled and now works without issues. ![]() Several repeated attempts give the same result: This has happened to several machines, both Intel and ARM models when trying to upgrade from various MacOS versions such as 12.0.1 and 11.6.x. The last days we have encountered a situation where the upgrade to MacOS Monterey 12.1 or 12.2 fails.Īfter several reboots the machine returns to the state before the upgrade started, with the addition of several applications crashing upon startup and needing reinstalls of these. ![]()
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