Wowhead announced today that it has released a download client for Mac OS X. Now the denizens of the cult of Mac can contribute to the collective WoW knowledge base that so deliciously feeds our need for data on lewtz. Just like the Windows version, the new OS X client installs Wowhead Looter, an addon which tallies up information in the background as you play and populates the Wowhead database with stats the game's items, drop rates, quests, and all sorts of other goodness.
Just remember that you need a Wowhead account before the Looter can upload information back to the database. Otherwise, you've just got yourself an addon that's all dressed up with no place to go.