how to remove Monterey os

moniek80 wrote:

How do i uninstall Monterey Os off my mac in order to downgrade to BigSur?

Revert your Mac to a previous macOS version


Revert your Mac to a previous macOS version - Apple Support

verify you are using the Safari browser to download/initiate the macOS links.

The older macOS installer backups on this server:

How to get old versions of macOS - Apple Support

restore items backed up with Time Machine

Restore items backed up with Time Machine on Mac - Apple Support

Can you share why you want to downgrade to Big Sur? If you're having problems it's often easier to fix the problems than downgrade to an earlier system. Just some food for thought.