updated 02:20 pm EST, Wed March 3, 2010
Teaser hints at Portal, Team Fortress 2
Valve is indeed planning to port some of its most popular games to the Mac, confirms the developer's marketing VP, Doug Lombardi. A teaser image (seen below) makes reference to Apple's famous "Get a Mac" ads, and the characters of Mac and PC played by Justin Long and John Hodgman. Standing in their place are turrets from Portal and Team Fortress 2, implying that these will be two of the first games to be ported.
By extension this suggests that Half-Life 2 and its episodic releases may be on their way, given that both Portal and TF2 were released alongside HL2: Episode Two for Windows. It is not known if the Steam gaming platform will be necessary to play, but Mac elements have been in found in the code of a recent Steam beta. A formal announcement is likely during the 2010 Game Developers Conference, scheduled for March 9th to the 13th.
[images courtesy of Shacknews, Eurogamer and Macrumors]
[additional images via Macworld and Rock, Paper Shotgun]