After seeding the fourth OS X Mavericks 10.9.3 beta (build 13D28) to developers a week ago, Apple today pushed out another pre-release version of the update, Mavericks 10.9.3 (build 13D33). Like previous builds, Apple is once again asking developers to focus on Graphics Drivers, Audio, Safari, and Contacts/Calendar USB sync via iTunes.

The new beta release is available now through software update and Apple’s developer channels.

One feature users can expect when the update is released to the public is the enhanced support for 4K external monitors we discovered in the first beta. Apple recently started seeding versions of the update to AppleCare employees alongside a pre-release version of iTunes 11.1.6 that will restore the ability to sync contacts and calendar data to iOS devices locally. The ability to sync contacts and calendar data to an iOS device from a Mac was removed previously (to many complaints) but remained possible through iCloud syncing.

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