alt Hacker NewsTo certify any version of macOS as UNIX, the security had to be significantly altered (disabling SIP) among a few other things. This is why what is shipped is not what is certified as UNIX. You can /make/ it match what is certified as an administrator, but that would be inadvisable.
https://www.osnews.com/story/141633/apples-macos-unix-certif...
EDIT: And really, UNIX certification means nothing except to potentially government agencies and people who don't understand what UNIX and/or UNIX certification is. Or why being "certified UNIX" is generally meaningless: see the BSDs, which are much closer to "UNIX" origins than macOS will ever be.
Or Windows, which is frankly just has better architected internals and abandons legacy UNIX ;-)
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> Or Windows, which is frankly just has better architected internals and abandons legacy UNIX ;-)
Current macOS user, and former NT kernel dabbler and VMS user here. That's highly debatable.
On the kernel side, Windows is still filled with legacy VMS-isms. Eg: Object Manager (object/resource model), named objects, handles, how processes and threads work, vmem, scheduling etc etc
On the userspace side, Windows is still filled with legacy DOS-isms.
Don't me wrong, I love the underlying Windows OS, despite its many quirks, but it's filled with perhaps even more legacy cruft and definitely isn't any sort of step above anything else.
I also don't believe anyone actually runs macOS in a UNIX-compliant configuration. Rather, it's a checkbox on some RFP and nobody is clued into why it's actually there, because all the people that did know have since retired.
> is. Or why being "certified UNIX" is generally meaningless: see the BSDs, which are much closer to "UNIX" origins than macOS will ever be
MacOS is BSD over Mach, which is itself derived from BSD.