Apple has just released the first beta of its OS X 10.8.4 for Mac. For the moment, the latter is reserved only for members of the AppleSeed program and will be very soon for developers.
Regarding the new features, nothing is indicated for the moment, but this version should logically bring bug fixes as well as performance improvements. As always, Apple suggests that testers focus on certain points. For 10.8.4, it’s Wi-Fi, graphics drivers and the native Safari browser.
As a reminder, the last update, OS X Mountain Lion 10.8.3 has known a dozen beta versions to finally be released on March 14 on the Mac App Store (read: OS X Mountain Lion 10.8.3 finally available).