It's a vicious circle. People are willing to develop hardware drivers for free if only vendors would release the hardware specs or donate the hardware to do the development. Hardware vendors develop windows and mac drivers and applications by themselves. Linux has stable kernel releases that drivers could be made compatible  with.

As for apps... You can cross-compile them with very little tweaking necessary. They're just choosing not to. How much effort do you think it cost microsoft to make IE and Office run on Mac OS? Not a whole lot. And that is BSD Unix compatible.

Oye, vatos, dees English sink todos mi ships, chinga sus madres, so escuche: el fleet es ahora refloated, OK? — The War Nerd