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Mach 2 (and thus XNU) was built on BSD 4, which was derived directly from Bell Labs UNIX V7. It has been “natively UNIX” as long as the other ancient V7 and SysV derivatives, like AIX and SunOS.

Maybe what you really mean is you don’t like UNIX and expect it to work like Linux?



Yes, Linux is better than any certified Unix and that's one of the big reasons macOS is worse for Unix-like things than Linux.


No doubt my dude, but thats not the point. BSD in MacOS is not a 'compatibility layer'

When CMU made Mach, it was a BSD OS. When Next made NextStep on top of Mach, it was a BSD OS. When Apple made OSX with NextStep, it was still BSD.




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