I eventually upgraded my Mac Pro mid 2012 to Mac Studio - only to find that my purchased Nik Collection 2 is not compatible with Mac Monterey…(Osx 12.5). …bit annoyed as it now means that I have to purchase Nik Collection 5 if I want to continue using Nik!
I also don’t think I can give my Collection 2 to anyone else…
Be sure to trial Nik5 before upgrading and read the posts in the forum.
Please note that not all Nik5 components are ready for Apple Silicon systems, but they’ve run on my M1 MacBook Air with macOS Big Sur and Monterey - with a little help from Rosetta 2.