Just one week after the previous OS X 10.8.5 beta was unleashed on developers, Apple has now begun seeding their fourth OS X Mountain Lion 10.8.5 beta. The update bears a build number of 12F20, the decrease in the time between updates suggests that Apple is likely nearly ready to release the update to the public.
Apple is continuing to ask developers to focus their attention on Wi-Fi, Graphics, Wake from Sleep, and PDF viewing and Accessibility. The update weighs in at 254.94MB for the traditional update, and 850.77MB for the combo update, and is available through the software update tool in the Mac App Store for those who tested previous Mountain Lion betas, as well as for direct download from Apple’s Mac Developer Center.