[TUHS] MacOS X is Unix (tm)

[Nemo]

On 2 January 2017 at 06:31, Joerg Schilling <schily at schily.net> wrote:
> David <david at kdbarto.org> wrote:
>
>> MacOS X is a certified Unix (tm) OS. Not Unix-Like.
>
> Given that MacOS X is not POSIX compliant, I would call it a UNIX-alike.
>
> Note that passing the certification tests unfortunately does not grant
> POSIX compliance :-(

Interesting -- I had always thought that UNIX03 incorporated IEEE
1003.x (http://www.opengroup.org/openbrand/register/xym0.htm ).

So what is missing and why?

N.

P.S. As UNIX is a registered trademark of X/Open, anything passing
UNIX03 is UNIX by definition.