Its new to mac so if you've bought games for pc in steam you'll have to buy them again for mac. Its a raw deal but thats a corporation for you.
Hope it helps.
'My friend Afterbanged so hard, he broke both legs, his hip, 4 ribs, caused an avalanche, and killed everyone within a 100mile radius of the 'bang.
But it was still not 'too much' bang.' - nickyp$