I looked it up. macOS is still unix certified.
BSD is usually not unix certified, so has to refer to itself as unix like.
What is and isn’t unix is kind of up to what definition you’re working with (pedigree, legally, practically).
And what always gets lost in these discussions is if that old Unix stuff was so amazingly good that we should automatically assume Linux is inferior for not doing it. Even though all the old Unix vendors are basically dead now and replaced by Linux. That might have happened for a reason.
BSD is usually not unix certified, so has to refer to itself as unix like.
Wait, really? Not POSIX? Huh
Also another reason I doubt current version macos is certified is:
“Because it’s an expensive and lengthy process. And every version will need to be re-certified.”
