Coffee Stain Studios announces plans for a OS X edition of Sanctum, saying the Mac edition of their first-person shooter/tower defense game is due on August 13th. The Sanctum website has details on how to apply to beta test this, saying those who own the Windows edition should all be granted access "shortly." Here's word:

Sanctum has taken Steam by storm, winning the community’s vote for last week’s Community Sale. Come August 13th, Mac users will be able to get their hands on the game and experience the awesomeness that is the first FPS/tower-defense hybrid. Those who own Sanctum now will see a separate Beta version in their games list that they can download and test.