Yes, macos takes its utils from FreeBSD. An interesting factoid is that FreeBSD/macos sort(1) was using GNU code until recently, since this is quite tricky to

Yes, macos takes its utils from FreeBSD. An interesting factoid is that FreeBSD/macos sort(1) was using GNU code until recently, since this is quite tricky to implement. Eventually it was reimplemented for GPL avoidance reasons. We do consider macos though, and ensure all tests pass on macos for each release