Half-Life 2 will be available for Mac gamers on May 26, 2010... that's just in time for Memorial Day weekend! Just download it from Steam and go to town.
Because they are awesome, Valve has chosen to make this announcement in the form of a parody of the iconic Mac 1984 ads from way back when, except instead of a anonymous heroine in dolphin shorts smashing Big Brother's TV with a hammer, it's Alyx Vance hurling that iconic crowbar at Wallace Breen's face. Check it out:
The original Mac ad is under the cut.