> MacOS is a commercial OS that happens to have a Unix substrate I am not sure what you’re implying. There always have been a lot of UNIXes that were “commerci

> MacOS is a commercial OS that happens to have a Unix substrate I am not sure what you’re implying. There always have been a lot of UNIXes that were “commercial OS”. Historically, the free branches of the UNIX family tree have been way out-numbered by commercial distributions. > but does not tend to show it too much That does not really matter (besides the fact that the terminal has always been there). The fact that there is a GUI shell on top does not change the architecture of the OS. > The Unix part is an implementation detail. These days, UNIX is a certification. Otherwise it refers to the architecture and origins of the OS, from the initial AT&T UNIX. The only purity test is the certification. > It is not marketed as a Unix workstation, much like Android phones are not marketed as Linux handhelds. How it is marketed and what it actually is are orthogonal concepts. It is UNIX, whether this annoys some people or not.