Allahu Al-Akhbar! Mac version supports PC's SS2 TOOL.exe, so you can get and use hi-res textures and object meshes within the game on Mac! Mr. Burns would say: Eeeeeeexcellent! Application procedure of the tool is viewable here: https://www.gog.com/forum/general/ss2tool_for_system_shock_2_mac
I have been looking for a playable version for MANY MANY MANY years, as the DOSbox version simply sucks, WinXP port features only 4 levels, and original Amiga version is too inconveniently hard to get properly emulated. This game features ability to lock in the direction of shooting (sort of a Robotron-like, 8-way ability to shoot one way while moving), a feature that eluded me in on my A500 in my youth. VERY useful feature, as it actually makes it possible to win this game (my best is 6th level on A500 with 1-button mammoth joystick the size of a small masturbator :). This game features one of the creepiest, alien-esquiest style of music ever made for a video-game - that one of NONE! Yes, there is no music, just a omnipresent low level hum of climatization systems. Add the prerequisite sound effects, for instance of elsewhere opening doors (never good), and this low-level hum perfectly conveys the sense of utter helplessness and despair in the open space, where nobody can hear your creams. More about this game at: http://en.wikipedia.org/wiki/Alien_breed
Now this is a game I was waiting for, ever since it turned a rather sour experience being emulated under DOSbox. Really great game, but with silly keyboard controls, I hope they fixed them in this variation of this game. A gamepad support would be excellent, as this game's controlls are pretty much like the early Resident Evil / Biohazard games, albeit this one with a battle-tank-sized armament :-) This game's isometrical POV can sometimes represent a challenge, as some narrow walking paths and elevator platforms may became blocked by the given view. But still... asci-fi version of the GTA from pre-3D times.