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Error: The volume cannot be used because it is a backup disk
I was not using, or at least I didn't know I was using, the HD as a backup disk. Apparently, sometime after the Mojave installation I messed it up. I was using Time Machine to backup to the Time Capsule.
How do I change my HD back into just a HD with no backup on it?
iMac 27″ 5K, macOS 10.14
You need to delete the backup from your disk. If the backup is on a separate partition you need to erase that partition.
However, if you can't do that you need to first backup, download the Monterey installer, create a bootable USB installer using
How to create a bootable installer for macOS
Boot from that installer and use Disk Utility erase your drive, install Monterey and last restore your data.
You need to delete the backup from your disk. If the backup is on a separate partition you need to erase that partition.
However, if you can't do that you need to first backup, download the Monterey installer, create a bootable USB installer using
How to create a bootable installer for macOS
Boot from that installer and use Disk Utility erase your drive, install Monterey and last restore your data.
MacOS Monterey won't install
