All Sennheiser gaming headsets with 2 plugs (microphone & audio) can also be used on Mac with the PCV 07 Combo Audio Adaptor.
Combo Audio Adaptor: 2 x 3,5 mm stereo jack plug to 1 x 3,5 mm 4 pole jack plug. Suitable for: PC 2 CHAT, PC 3 CHAT, PC 11, PC 21, PC 21-II, PC 31-II, PC 100, PC 121, PC 131, PC 141, PC 151, PC 230, PC 300 G4ME, PC 310, PC 320, PC 323D, PC 330, PC 333D, PC 350 (SE), PC 360, PC 363D, GAME ZERO, GAME ONE.
Combo Audio Adaptor: 2 x 3,5 mm stereo jack plug to 1 x 3,5 mm 4 pole jack plug. Suitable for: PC 2 CHAT, PC 3 CHAT, PC 11, PC 21, PC 21-II, PC 31-II, PC 100, PC 121, PC 131, PC 141, PC 151, PC 230, PC 300 G4ME, PC 310, PC 320, PC 323D, PC 330, PC 333D, PC 350 (SE), PC 360, PC 363D, GAME ZERO, GAME ONE.