Steam set to arrive on the Mac May 12

Valve revealed Thursday that Steam, its digital distribution service for games, will launch a Mac OS X version on Wednesday, May 12th. With over twenty-five million users and hundreds of games at its disposal, Steam is a gaming marketplace that allows players to purchase and download games completely digitally. In addition to bringing Steam to the Mac, Valve has also promised to bring over its "Source" gaming engine and a number of the company's popular titles, including Team Fortress 2, Counter-Strike, Portal, Left 4 Dead 2, and the Half-Life Series.