Showing posts from January, 2021

Loss of Administrator access after upgrade to macOS Big Sur

 It appears that in some cases the upgrade from macOS Catalina to macOS Big Sur causes a user with Administrator access to lose these admin privileges. One of the main symptoms is the inability to unlock the Security and Privacy System Preferences app. There is a thread on the Apple developper forum that describes the issue and provides possible fixes: Reset the SMC. This actually worked in my case, and I didn't try the other proposed fix. Reboot in Recovery Mode (press Command+R right after turning the computer on), open the Terminal (using the Tools menu) and delete /Volumes/Macintosh HD/var/db/.AppleSetupDone