Apple recently seeded the latest OS X Mavericks 10.9.3 beta to developers with iterative changes and enhancements while asking developers to concentrate on the usual focus areas including graphics, Mail and iTunes syncing. Apple’s latest version of the upcoming OS X maintenance update, dubbed build 13D45a, is the eighth seed since the first OS X 10.9.3 beta which was released in March.

According to the accompanying seed notes, Apple is looking for feedback on Graphics, Drivers, Audio, Mail, Safari and iTunes contacts and calendar synchronization. Prior betas of the upcoming OS X 10.9.3 Mavericks brought support for pixel-doubling scaling, suggesting the update will introduce a so-called “Retina” output mode for tge late-2013 MacBook Pro with Retina display connecting to external 4K monitors.

Developers can download the build 13D43 from Apple’s Developer Portal or via Software Update.

Source: Apple