Apple released OS X Mountain Lion 10.8.3 to developers after releasing build 12D50 earlier this month on Jan. 8 with no known issues. Apple says that the new build includes significant changes to WiFi, developers have been asked to focus their testing on AirPlay, AirPort, Game Center, Graphics Drivers, and Safari.

Apple’s latest release have touted a new “OS X Software Update Seed Configuration Utility” that retrieves new seeds through Software Update. When new builds are provided, Apple sends out notifications to install the update via the Mac App Store.