Hey Mac users!  Now you can finally play a bunch of solid games on your computer!  Steam, a games distribution service that’s been widely available on Windows PCs for years, is now available for Mac OS X.  Steam is run by Valve, the company behind popular games like Half-Life, Team Fortress, and Left 4 Dead 2.  In layman’s terms, Steam is a centralized place where computer gamers can browse, preview, and download a number of titles.  It’s also got a bunch of social features like chat, and friends lists.  And get this–for a limited time (until May 24) Steam is offereing a FREE download of one of Valve’s most popular and best rated games, Portal.  It’s a highly addicting, first-person puzzle game, so get on that before it’s too late.  Besides Valve games, Steam for Mac (which looks almost identical to its Windows counterpart) already houses a bunch of third party games like Civilization IV, Bejeweled 2, World of Goo, and City of Heroes: Architect Edition.  Click here for the DMG download of Steam for Mac.

[Via Joystiq]