Provision of maintenance procedures and tools is at the heart of software engineering, but not in macOS.
Volume Group
If something goes wrong with Catalina’s boot Volume Group, it seems there’s no way to repair it, or change the Data volume. Or is there?
Older versions of Catalina can fail to erase the System and Data volumes, but 10.15.6 should be able to, making clean re-installation simpler.
From SIP to a protected read-only System volume, macOS 11 takes system protection a big step further with cryptographic verification.
macOS Catalina is the first version of macOS which boots not from a single volume, but from two: […]
The Finder, Disk Utility and Terminal show disks and volumes differently, according to their function. This can appear confusing in Catalina until it has been explained.
Was WWDC a damp squib after all? With only one new unaffordable Mac announced, and more dreadful privacy dialogs on their way, you might think so.
The Eclectic Light Company 