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How do i totally wipe my hard drive and reinstall Catalina if Disk Utility won't let me erase the HD
(it's just greyed out and not an option to click)
iMac 27″, macOS 11.1
Boot from Internet Recovery or a bootable USB installer.
Boot from Internet Recovery or a bootable USB installer.
Restart to your Recovery HD, open Disk Utility,
Click on View in the menubar and select Show All devices.
Highlight the Disk not any of the indented Volumes.
Click Erase.
Give the disk a name,
Format: APFS
Scheme: GUID Partition Map
Click Erase.
When Done quit Disk Utility.
Have you made a bootable USB installer for Catalina
before you go ahead and erase your Big Sur install.
Disk Utility won't let me erase the HD
