Mac OS update failed for the first time in 19 years

from blog The Desolation of Blog, | ↗ original
I bought my first Mac, an iMac G4, in 2002. It came installed with Mac OS X 10.1 Puma, and I've been installing minor and major Mac OS X and macOS updates ever since, with the one exception of Mac OS X 10.7 Lion, which in my opinion was the worst Mac OS version ever (before now). My current machine is a 2014 MacBook Pro, which I had updated from Mavericks through Mojave. I did skip macOS 10.15 Catalina, however, which I've heard was very buggy, and I had been holding off as long as possible on macOS 11 Big Sur, which I've seen is very ugly. Ultimately, though, I couldn't wait any longer, because I need to run the latest Xcode beta in order to develop Safari extensions for iOS, and the latest Xcode beta requires Big Sur, so I finally decided to update to Big Sur on Saturday. This was a disaster.