Being an UNIX is irrelevant for Apple related development, it is just a side effect of being based on NeXTSTEP, which also only used POSIX compatibility as an attempt to take business away from SGI and SUN.
If you want UNIX development, without any regard for OS X and iOS, then go sponsor hardware vendors selling Linux and BSD based systems.
That's because they are "fine" with anything Apple does, I guess removing ports wasn't enough for them to see beyond their own stupidity.
OS X developers have to be the dumbest of them all, if Apple tells them to jump off a bridge they probably would too.
They are blind for a brand.