Error: The volume cannot be downgraded

[Ohtiomo]

Hi everyone, early I installed the beta version of macOS Monterey. Now, I leave the beta profile in system preferences and download a macOS Monterey official installer in App Store, but i can't to update it to finish version, because I have this error. How to fix it?

 

[BaggieBoy]

So what is your current version, I presume it's a 12.1 beta? If so, then trying to install 12.0 would indeed be a downgrade.

 

[Fishrrman]

I will guess that your choices are:

1. ERASE the ENTIRE drive, and start over. (if it's possible)
or
2. Keep the 12.1 beta until the official release "catches up" with it. Then, remove yourself from the beta program.