I tried the free MekTek version of the game and found it not to work (CrossOver Games Mac 9.1.0 on a MacBook Pro with Mac OS X 10.6.3).
First of all, the installer does not work at all: the icon appears for a second in the Dock, then it immediately quits. Instead, I installed the game under Windows (using Bootcamp) and then copied over the game folder to a previously prepared COG bottle. Into this bottle, I additionally installed the Visual C++ Runtime Redistributable 2005, which the game apparently requires. However, even with this, attempts to launch the game only yield cryptic error messages.