The dolphin emulator CAN be compiled on mac and linux (see guides at http://code.google.com/p/dolphin-emu). however, the mac version is not worked on very much by the devs and therefore is slow and hardly functional. (this may be true for the linux version too, someone should probably go and verify that) the emulator with the openGL plugin runs at a reasonable speed under crossover games. i would NOT recommend the DX9 plugin. all that has done is freeze the whole bottle. also, it is not worked on as much as the openGL plugin. (see app decription)