Apple today seeded build 12D61 of OS X Mountain Lion 10.8.3 to developers, marking the ninth beta iteration of the newest version of Mountain Lion. 10.8.3 was first seeded to developers back in November.
Build 12D61 has been released less than a week after build 12D58. The new build asks developers and testers to focus on AirPlay, AirPort, Game Center, Graphics Drivers, and Safari.
As with previous builds, Apple mentions that it has significantly improved WiFi performance, as noted by 9to5Mac. Registered developers can download the update on Apple’s Developer Page.
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Apple Seeds Build 12D61 of OS X Beta 10.8.3 to Developers [Mac Blog]