Valve put its weight behind Apple's OS X last month, announcing that it would begin supporting the Mac operating system with its digital distribution service Steam as well as its own library of games by April. Today, the Bellevue, Washington-based developer revealed a slight delay for Mac integration, saying Mac users will be able to access goods on Steam beginning May 12.

　　Portal 2 will be Valve's first new game to support Macs. Once Mac integration goes live, Mac users will gain access to the Valve catalog, which includes the Half-Life and Left 4 Dead series, as well as Team Fortress 2, Counter-Strike, and Portal. Valve's first new game to feature Mac support will be Portal 2 when it launches this holiday. The full-length, stand-alone title will include both single- and multiplayer modes in addition to other new features.

　　Additionally, Valve has added Mac support into its Steamworks development toolkit, which allows titles built using the software to be interchangeable between the PC and Apple's platform. Further, Valve intends to release game updates for Windows and Mac editions simultaneously. In fact, Mac and Windows users will intermingle in online matches, playing and communicating on the same servers and in the same game lobbies.