@b787c57c24ac48d0 They're old PC games, though. There's no mac versions for like 90% of them. I think the only ones of them that were ever released on Mac were the first C&C, and C&C: Generals, and the first C&C pre-dates OSX so that's not even compatible with modern macs, and Generals is 32-bit, and I heard that the most recent generation of macs also simply don't support that anymore.
You can also buy the collection on Steam, but I dunno if that improves mac compatibility in any way. As it stands, the offered games are pure Windows versions.
Thanks for your support, steam is only supporting the old C&C versions for Mac but not Generals or Zero Hour. Generals is what I am after.
Anyway, I do not give up hope to find a user-friendly way to play my all time favourites.
Have a good weekend
