Apple Seeds First OS X Mavericks 10.9.3 Beta to Developers
Apple today seeded the first test build of OS X 10.9.3 to registered Mac developers, just over a week after releasing OS X 10.9.2. The new beta, which has a build number of 13D12, is available through the Software Update mechanism in the Mac App Store as well as through the Mac Dev Center.

Apple is currently asking developers to focus on Graphics Drivers and Audio, and there is no word yet on specific fixes and changes included in the update.
The last Mavericks update, OS X 10.9.2, added FaceTime Audio, the ability to block iMessage users on the Mac, and a fix for a critical SSL vulnerability. 10.9.2 saw a beta testing period of approximately two months, and it is likely 10.9.3 will also see several beta iterations before a public release.
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Top Rated Comments
Also, this was snappier than expected.
What's new here?
What Mac do you have? I have none of the issues and Mavericks is pretty much the best OS X release since Snow Leopard for me.
This is the biggest pile of crap I've ever read!
10.9.3 will not turn OS X into iOS! Apple have stated they have no intention of merging the two!
And no it doesn't make me want to go back to the mess that was Mountain Lion! Mavericks is far superior.
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Me neither. Mavericks is far superior.
On that note, push notifications are amazing.
This is still good news though!