upgrade MacOS Monterey problem
Spec : imac 27 Retina 2020 i9 big sur 11.6.1
problem found after updated MacOS Monterey 12.0.1
1) Screen saver found malfunction :- cannot select or click on new installed Monterey pics or big sur default pics as well, AND, only dark screen when screen saver if active
2) Face Time doesn't work : - even any caller or any device call-in, Face time was cut when which side picked up, AND, no any button or pull down appear for further action
I have call Apple support but actually can't solve the problem
sad and painful downgraded in finally
anyone can help or advise please
regards
iMac 27″, macOS 11.6