Apple on Thursday issued the fifth OS X 10.9.3 Mavericks beta to developers, asking testers to focus on graphics, audio, Safari and the recently restored iTunes contacts and calendar syncing over USB.
The latest OS X 10.9.3 beta, dubbed build 13D33, comes after the prior release was seeded in late March. Like the previous build, however, Apple's current pre-release software contains similar focus areas for testing.
Build 13D33 contains no known issues and focus areas are the usual Graphics Drivers, Audio, Safari and . Mail is once again included in the list of focus areas, something Apple has been since Mavericks launched .
Previous OS X 10.9.3 betas added pixel-doubling scaling support, suggesting the upcoming maintenance update will bring a so-called "Retina" output mode for users connecting their late-2013 MacBook Pro with Retina display to external 4K monitors
Developers can download the build 13D33 from Apple's Developer Portal or via Software Update.