How to remove MacOS Monterey Beta 12.0 from my Mac?
I just bought this refurbished Macbook Pro M1 (2020) from Apple. Somehow it was signed up for the beta program. Although it's possible it got this setting from my previous 2010 Macbook Pro, it's doubtful because I'm by no means a Mac power user.
Is there a way to roll this back to a previous (non-Beta) version of the MacOS?
Like some others I can't see my WD My Passport Ultra external HD. And their posts seem to indicate it's related to the BigSur MacOS.
Anyhow, I'm now considering returning this to Apple.
Thanks in advance!
[Re-Titled by Moderator]