Another week, another Apple (AAPL) operating system beta. Apple on Monday seeded its beta for OS X 10.8.3 to its developer community through its Mac Developer Center as “Build 12D32.” According to MacRumors, the new beta focuses on tests for “AirPlay, AirPort, Game Center, and Graphics Drivers.” Anyone interested in working with the beta will need to install the OS X Software Update Seed Configuration Utility to complete the upgrade.