Make a bootable clone of your functional system drive then upgrade.
Sadly, that's the most sensible way to proceed with macOS updates these days. Apple has tarnished their reputation as a provider of reliable operating system software.
Steve would be furious. Unfortunately Steve is dead.
Sadly, that's the most sensible way to proceed with macOS updates these days. Apple has tarnished their reputation as a provider of reliable operating system software.
Steve would be furious. Unfortunately Steve is dead.