Apple Releases First OS X Mavericks 10.9.3 Beta to Developers

Apple has released the first OS X Mavericks 10.9.3 beta to registered developers. This beta-version comes just one week after OS X 10.9.2, which contained a fix for SSL vulnerability, FaceTime Audio feature and a bunch of other important improvements.

The new OS X beta has a build number 13D12. Apple has asked the developers to focus on graphics drivers and audio.

According to what iDownloadBlog reporters write, OS X Mavericks 10.9.3 looks pretty much the same as the previous version. However, there’s one useful new feature you will surely notice if you have a 4K display: it has become possible to use the native Retina resolution on such output device.

The beta seemed insignificant, with no mention of any changes or new features;  just a brief request that devs focus their testing on audio and graphics.

But as it turns out, there is at least one notable difference in the beta: a new ‘Native’ Retina resolution option for 4K displays. This enables users with compatible displays to use OS X in a noticeably sharper Retina mode at 60Hz.

If you have an Apple developer account, you can download OS X 10.9.3 from the dev’s portal or via Software Update.