I have working Macbook Air M1, i just need to downgrade or make clean installation with Big Sur.Įrase the internal macOS container, then install Big Sur and restore your system from your Time Machine backup at a point before the upgrade. If you still have issue on the fly you can Call Customer Support (800) MY–APPLE (800–692–7753) How to reinstall macOS from macOS Recovery. How to erase your Mac Erase and reinstall macOS - Apple Support If your machine shipped with macOS Monterey, you can not install/and run and older macOS. But when i selected to delete Volume group i got big warning which says:

So i quit install and started Disk utility to delete Volume Group.

selected Macintosh HD as disk to install problem: popup says:.

logged in to my account (password needed).

I followed these steps: reboot holding power button while Install macOS Big Sur Many thanks for any help to get my new notebook again usable.īecause of problems with Monterey i tried to downgrade to Big Sur. I found some YT videos, but with old settings to enable USB install, M1 currenty don't have such dialogues. So, my question is: how to get Big Sur again as clean install? With intel Macbook it's easy, but M1 is new to me and I don't know how to procede to get clean new Big Sur from USB or internet. So, does anybody know how to reinstall to Big Sur with USB disk? I found, somewhere, that new M1 is unable to install from internet.

problem: popup says: The volume cannot be downgraded.

selected Macintosh HD as disk to install.

holding power button while Install macOS Big Sur, than choosed.

Because of problems with Monterey i tried to downgrade to Big Sur.

Big sur install usb