Valve confirms Mac support for Steam and Source Engine

Valve confirms Mac support for Steam and Source Engine: "In today's completely shocking and unexpected bit of news, Valve has announced Mac support for its Steam digital distribution platform and Source -- the engine that powers Half-Life 2, amongst others. In fact, Portal 2 will be Valve's first simultaneous release across PC and Mac. 'Steamworks for the Mac supports all of the Steamworks APIs, and we have added a new feature, called Steam Play, which allows customers who purchase the product for the Mac or Windows to play on the other platform free of charge,' said Valve's Jason Holtman."