If you have backed up your Mac before the reinstallation, you can retrieve your data from Time Machine, an external hard drive, or somewhere else, depending on the way you used to make the backup. If you haven't created any backups for your Mac, then you'll need the professionalMac da...
Once you have executed these steps, move ahead and search for the available Big Sur update on Mac.Fix 6. Reinstall your macOS With the Latest VersionThe last fix you can give a shot at is to reinstall your macOS, which might help you install the latest version. This reinstallation will ...