It means nothing, it’s just a paycheck you sign and then you get to say “I certify my OS is Unix”. The little bit more technical part is POSIX compliance but modern OSs are such massive and complex beasts today that those compliances are tiny parts and very slowly but very surely becoming irrelevant over time.
Apple made OSX Unix certified because it was cheap and it got them off the hook from a lawsuit. That’s it.
Yes, of course. Because oil has never depended on outside countries that are openly hostile. No sire, thank goodness we rely on a power source that no war has ever been fought for, ever in history.
/s