Users report the new OS can brick iMac, Mac mini, and MacBook Pro
If you’re using an older piece of Apple hardware, like a Mac mini or a pre-silicon chip MacBook Pro, you might want to hold off on installing the newest macOS.
Multiple Mac users arereporting issueswhen trying to installmacOS Monterey, with the process typically rendering their machine unusable (i.e., “bricking”).
It seems something is going wrong with the post-installation restart process, causing some systems to simply give up on turning on at all.

Apple
According toMacRumors, the problem seems to be affecting older machines like the Mac mini, iMac, and some models of the MacBook Pro.
Apple
For the time being, it seems as though this problem doesn’t affectsilicon-based Macs, which only go back as far as 2020 and all use Apple’s M1 chip.
Thisdoesn’t mean you’re in the clearif your Mac is from 2020, however, as some models still came with the Intel i9 chip.
Before updating, it’s suggested you look at the key in of processor your Mac is using, rather than just the production year.
If you’ve installed macOS Monterey and now your Mac won’t start, you’re free to venture to fix it by following Apple’sConfigurator 2 User Guide.
If that doesn’t work, some users have been able to get their computers back online by taking them into an Apple Store for maintenance.
If you’re unsure if installing Monterey will affect your system, it might be best to wait for an update or two, just to be on the safe side.