Here are the most common troubleshooting tips if macOS Big Sur doesn’t recognize your admin password: 1. This renders your admin password unusable when you want to edit System Preferences and change other admin-level settings. It causes your Mac to ‘forget’ which accounts have been assigned with administrator privileges and which not. These issues have occurred for some during the beta testing stage and it seems that the macOS Big Sur Password bug has found its way to the public release. You’ve just updated to macOS Big Sur but aren’t able to unlock your Mac? Is the admin account password not working although you’re sure that you’re entering the correct one? Are you asked to enter your password again or are prompted by the ‘No users available for authorization’ error message? Or, worse the Mac freezes on the password authentication screen and a spinning wheel is running in a loop?
Mac Password not working in macOS Big Sur.