I’m setting up a brand new m2 mac mini 8/256. It immediately suggested updating to Sonoma 14.2.
It got to this point:
“Preparing macOS Sonoma 14.2…
About 5 minutes remaining”
That was stuck there, no kidding, at least 30-35 minutes.
Finally a dialogue box appeared saying the computer will restart in 60 seconds to install the update.
But at the same time a whole ‘nother page appeared urging me to download and install a 14.2 update! Ok… (btw. this exact thing happened on my MBA today, I had to ignore the duplicative update urging and manually restart a couple of times before the Apple logo appeared and the installation progress bar.).
Meanwhile on the mini the countdown went to zero and the dialogue box disappeared and no restart. I waited awhile and when it became clear that nothing was happening, I restarted manually.
After a lot of black screen autorestarts/Apple logo/progress bar, it finally got to the desktop and I checked to make sure the About showed 14.2.
Not exactly a smooth process, but at least it worked, YMMV./shrug/