Users participating in the beta program for iOS, Mac OS X, TVOS and watchOS find new betas available for Apple devices.
The lot of the third beta of iOS 9.3.3, OS X 10.11.6 and TVOS 9.2.2 are available for download from now on devices that are authorized to receive beta updates. Beta versions are available via the software update mechanism or through the center developers. As usual, the beta versions of operating systems are not for broad public or for occasional use.
For now, there is no news about new features and updates will probably focus on solving problems and errors with current versions of operating system software for the iPhone, iPad, iPod touch, Mac, Apple Watch and Apple TV.
Keep in mind that these betas are aimed at older versions of the main OS Apple (before the WWDC 2016) and are a lot apart from the recent betas of iOS 10 macOS Sierra, TVOS 10 and WatchOS 3.
This batch of updates betas, in its third version, iOS 9.3.3, OS X 10.11.6 and TVOS 9.2.2 are generally aimed at minor bug fixes, performance improvements and security, so that radical changes will be focused definitively in the new range of operating systems presented at WWDC 2016 (iOS 10, macOS Sierra, WatchOS 3, etc).
Normally, the Cupertino company goes through a variety of beta versions of software for tuning before launching the final version, so it would be reasonable to expect to be made public versions of OS X 10.11.6, iOS 9.3 9.2.2 .3 and TVOS sometime in the third quarter. Meanwhile, for macOS Sierra 10.12, iOS 10 TVOS 10 and watchOS 3 it is expected to launch a broad public is made in September.