EA's Origin is now available for Mac gamers out there. Come on, we know you exist, stop trying to hide.
Origin for Mac launches with a catalogue of hit titles from EA and publishing partners available for immediate purchase and download, including Dragon Age™ 2, Batman: Arkham City, LEGO Harry Potter and The Sims™ 3. In a special launch offer and to celebrate more than a decade of The Sims, players can enjoy huge savings across The Sims 3 franchise on Origin. The Sims anniversary sale gives players a chance to download The Sims 3 base game, plus numerous expansion and stuff packs via the new Origin for Mac application for as little as $10. These ‘simtastic’ savings on Origin are available for a limited time, so players should act fast.
Terrible attempts at puns aside, the Mac version of Origin functions similarly to how Steam does things. That is to say, if you buy a game on one platform, say the PC, and it also works on OS X, then you will be able to install it onto your Mac as well. You probably won't be able to be logged into both at the same time though.
Feel free to hunt for the tiny "Download for Mac" link on the Origin client download page.