Erase the main disk (it’ll appear as an external drive). I chose Mac OS Extended (Journaled), GUID Partition map, but the installer ended up upgrading it to APFS for me anyway. I called mine “Main”
erase-disk
Erase the main disk (it’ll appear as an external drive). I chose Mac OS Extended (Journaled), GUID Partition map, but the installer ended up upgrading it to APFS for me anyway. I called mine “Main”