Apple is planning to release a publicly available beta of the upcoming OS X Yosemite later this month, according to sources briefed on the plans. This release will mark the first time Apple has released a public beta of a new OS X version in over a decade.
In addition to iOS 7.1.2, Apple today released OS X version 10.9.4 for all Macs running Mavericks. While 10.9.3 was a relatively large update that improved 4K display support on several Macs and restored local contact and calendar syncing, 10.9.4 is only a few hundred megabytes and focuses on smaller problems.
The brand new OS X Yosemite is perhaps the most dramatic redesign of Apple's operating system to date. After some time using the biggest features in the new OS in a developer preview, I think Apple's on to something.
At this stage in the game, it's not fair or appropriate to give the new (very beta!) version of OS X a real evaluation. Some of the features aren't fully-formed, while others—ahem, iCloud Drive—seem barely present at all, at least not in the final form we were expecting.
Named after the California national park, Yosemite will be available later this fall, and end users will be able to sign up for a public beta program in the summer. As with Mavericks, the Yosemite update will be free.
In my Mac Pro review I lamented the state of 4K display support under OS X 10.9.0. In my conclusion I wrote: "4K display compatibility under OS X is still a bit like the wild west at this point". Compatibility was pretty much only guaranteed with the ASUS/Sharp 4K displays if you cared about having a refresh rate higher than 30Hz. Even if you had the right monitor, the only really usable resolution was 3840 x 2160 - which ends up making text and UI elements a bit too small for some users.