Jobs’ Mob which thinks it should have little difficult testing its new operating systems on older machines, because there are fewer of them, does not seem to have bothered. In fact it has repeated the same mistake as it did last year with the launch of macOS Big Sur when older machines also reported issues.
Users have been complaining on the Apple Support Communities that as they were attempting to update their Mac to macOS Monterey, the Mac went completely black and they're unable to turn it on. One post in specific includes several comments from users also reporting similar issues. There have been reports on Twitter too.
A comment on a post on Reddit includes a user chronicling their experience, saying that the macOS Monterey update bricked their 2017 iMac, declaring that "it's just dead".
Monterey has a habit of saying after the install that it needs to restart and it never does. Turning it off and turning it on again does not work and that is the limit of most Apple users technical skills.
One possible solution floated on Apple Support Communities is that users may need to revive or restore their Mac's firmware. "In very rare circumstances, such as a power failure during a macOS update or upgrade, a Mac may become unresponsive and so the firmware must be revived or restored", Apple says in a support document.
Of course a more efficient manner would be to take an axe to the thing and buy a proper PC rather than a shiny toy which can’t be upgraded. However, most Apple fanboys see it as a sign from the gods that they must sell their children for medical experiments to buy a new computer which will be useless in a few years time.
All user reports suggest the issue is impacting older MacBook Pro, Mac mini, and iMac models. More recent computers such as Apple silicon-based Macs are not seemingly having problems, at least according to the lack of user reports suggesting so.