[jahnu]

I have a 2016 MBP and it's already stuck on Monterey. How are you planning to upgrade a 2012 iMac beyond Catalina anyway?

[3guk]

At a guess I would say probably using OCLP - https://github.com/dortania/OpenCore-Legacy-Patcher - lots of life left in old Mac’s using that tool !

[walteweiss]

And when that comes to an end, you can try Fedora Linux and it may serve very well. Especially if for a shared computer you need browser plus some other popular apps. I use Fedora on my old Hackintosh (that served me well for over a decade) and I hadn’t noticed any difference with macOS software and aesthetics-wise.

[drukenemo]

OLP made Mac unusable. Too slow to even load icons in the system settings. Had to revert back to Catalina.