[yokoprime]

Im sorry, but i dont buy that. Unix certification has nothing to do with number of processes running or "efficiency"! The OS must be SUS compliant, i.e have all the core interfaces in place, all the correct utilities (awk, grep, vi, sed etc) and theres something about header files, filesystem requirements etc. even if the macOS submitted for certification is super trimmed down, it does not matter as long as its a true subset of what is shipped to consumers.

MacOS is certified UNIX i.e its "UNIX", like it or not. On this point the article is just wrong.

[timetopay]

Unix is both a family of operating systems and also a trademark. The name is overloaded - "Unix" is more than one thing at the same time. In addition, the trademark is "UNIX" and the operating system family is "Unix"

MacOS is both UNIX and also not Unix at the same time.

If the trademark holders decided to UNIX certify my cat, which is well within their legal right to do so, would that make her UNIX?

[greggsy]

Unlike macOS, your cat does not, and will not, meet the industry-accepted standard that describes unix as we know it today.

https://www.opengroup.org/openbrand/register/xym0.htm

[remix2000]

Or perhaps they just won't certify your cat just as Apple won't start making Windows PCs…?