Can you make an application on Linux using POSIX APIs? How about on Android? Your argument seems to be macOS is not a UNIX because POSIX doesn’t specify a GUI toolkit, but this is quite frankly absurd.

What is absurd is the way every UNIX afficionado is trying to turn my words around.

I talk about the culture of the application developers and what Apple developers that are on the platform since the System days care about, and keep being told Mac OS X is an UNIX.

Of course it is one, that is not the point being made.