how to do reset factory mi iMac
how todo a factory reset my iMac
iMac 21.5″, macOS 12.2
Follow the steps at > What to do before you sell, give away, or trade in your Mac - Apple Support
If you are keeping it and just wanting to erase and reinstall macOS for a fresh start,
see > Use Disk Utility to erase an Intel-based Mac - Apple Support
and > How to reinstall macOS - Apple Support
