I've rated this game Silver on an Intel iMac running OSX 10.5.4 with an ATI Radeon HD2600 Pro graphics card and using Crossover Games Mac 7.0 and 7.1.1 and XQuartz 2.2.3
This is because that although I can get it to run perfectly, if I don't run it at my LCD screen's native resolution or don't switch off Reflections in Setup, there are display bugs.
In the case of the non-native resolution, this is in the form of scrambled square fragments of the desktop at the top 3rd of the screen, with the game screen pushed down, and the bottom being offscreen and inaccessible.
In the case of the Reflections setting, it triggers an annoying but manageable bug wherever there is water in the scene, where the lower left quarter of the screen is overlaid with water effects which should appear behind the rock Lara stands on. Gameplay is otherwise unaffected, and only appears when there is water behind rock or other surface.