Apple has just seeded their 9th beta build of OS X 10.8.3 to developers, less than a week since releasing their last beta. Developers are once again asked to focus on AirPlay. The build number for the update comes in at 12D61, and developers are once again asked to focus on AirPort, Game Center, Graphics Drivers, and Safari as they test their apps against the new build.
As with the last couple of builds, Apple also notes that today’s 10.8.3 build includes significant WiFi improvements. The update is available now through Software Update for those who already have a 10.8.3 beta installed, as well as direct download from Apple’s Mac developer portal.