By Jim Homme, 14 June, 2022 Forum macOS and Mac Apps Hi, I didn't realize my early 2015 Macbook Air doesn't support Monterey. I need to downgrade, I think, to Big Sur. Can anyone please point me to the right procedure for doing this? Thank you so much. Options Log in or register to post comments Comments Google it There are articles easily available by googling. Good luck! Bruce Downgrading There are a cupple ways to do this. The first way is booting into recovery and using a Time Machine backup to downgrade. The second way is is using a bootable install of Big Sur to downgrade. Unfortunately Disk Maker X is no longer being developed, so you’ll have to use the terminal to create the bootable install.