[duskwuff]

As an aside:

> ... copy the binaries uucp, uuname, uustat, and uux from /usr/bin to /usr/local/bin and the binaries uucico and uuxqt from /usr/sbin to /usr/local/bin ...

This should be your hint that UNIX certification is more of a box-checking exercise than a real test of functionality. UUCP has been functionally obsolete since at least the mid-1990s; it's surprising that macOS even bothers shipping its binaries, and it's exceptionally silly that UNIX certification requires it to be present and installed in /usr/local.

[wtallis]

It doesn't look like the certification requires those UUCP binaries to be in /usr/local, that's just where you have to put them on macOS to be able to `chmod +s` them, which is what the certification actually requires. Less arbitrary, but even more clearly obsolete and bad practice for a modern OS.

[duskwuff]

Oh, that makes more sense. I'm still not sure why you couldn't give the binaries setuid in their default locations, given that compliance testing also requires SIP to be disabled - but, in any case, at least they aren't setuid by default.

Anyways, "real UNIX systems must implement UUCP" is still extremely silly.