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macOS is a Unix by pedigree; Linux is not.

https://en.wikipedia.org/wiki/List_of_Unix_systems#/media/Fi...

I have to dig out this chart when people complain about macOS's "non-standard utilities." Linux's GNU tools are the ones that aren't standard. If anything, Linux did an "embrace, extend, extinguish" against Unix in general.



It's also not just Unix by pedigree, but also by certification [1].

[1]: https://www.opengroup.org/openbrand/certificates/1223p.pdf


I’d add that it is rather prescriptive to declare that macOS is not a “proper multi-user system.”

It is quite capable of handling multiple users. Maybe just not in the way that certain people want it to.




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