This morning after Time Machine did its usual backup, I decided to to the update to macOS 12.3 on my MacBook Pro 13” 2020 (no repairs have been done on this unit). System Update downloaded the installer and began the process of updating my system.
After a reboot, the Mac rebooted with the big Apple on the screen with the progress bar underneath. I noticed that the progress bar was at the same point for over half an hour so I opted to reboot the Mac. Big Apple appears with progress bar and as before it stops at about 20% in.
I reset the SMC, same as before. I booted into Recovery Mode and checked the disk for errors. There were several errors related to Time Machine snapshots. I tried repairing several times with the same results.
I decided to reinstall Monterey. The laptop starts the download and proceeds to do the installation. Upon the reboot, I get the Big Apple with progress bar but now it stops at about 90%. I tried to reinstall Monterey twice with the same results. I went back into Disk Utility to run First Aid and there were no longer any errors.
At this point, I am guessing that I need to format the drive, install Monterey, and restore from backup (thank goodness I have one).
Am I at the right conclusion? Is there anything else that I can do before doing a format/reinstall? If I do have to format, which partition do I erase the one labeled “MacBook” or “Macintosh - Data”?