I would really want to have a macOS (not just Darwin) container, but it seems that it is not possible with macOS. I don't remember the specifics, but there was a discussion here at HN a couple of month ago and someone with intrinsic Darwin knowledge explained why.
Heck even Microsoft managed to run Windows containers on Windows, even with the technical debt and bloat they had. Apple could, they just don't want to because it goes straight against their financial interests
I would really want to have a macOS (not just Darwin) container, but it seems that it is not possible with macOS. I don't remember the specifics, but there was a discussion here at HN a couple of month ago and someone with intrinsic Darwin knowledge explained why.