Members of Apple's registered developer program were provided a quartet of fresh updates on Monday: the fourth pre-release betas of iOS 9.3, tvOS 9.2, watchOS 2.2, and OS X El Capitan 10.11.4.
All four test builds are now available to download through Software Update or via Apple's official developer portal. They arrive the third betas were released.
iOS 9.3 beta 4 is identified as build 13E5214d, watchOS 2.2 beta 4 is 13V5129c, tvOS 9.2 beta 4 is 13Y5210d, and OS X 10.11.4 is 15E49a. A new fourth beta of Xcode, identified as build 7D152p, is also available, as well as Apple Configurator 2.2 beta 4 build 3C36.
iOS 9.3 brings with it a number of new features, notably the sleep-enhancing Night Shift mode. The iPad gains multi-user login for educational customers, while Music, CarPlay, and Health have also received some attention.
ÌÇÐÄVlog also detailed last week how the forthcoming update will allow third-party apps to to a user's iCloud Music Library directly from the device, without the need to use iTunes on a Mac or PC.
watchOS 2.2 -- when used in conjunction with iOS 9.3 -- will allow owners to pair to a single iPhone, and brings a the Maps app's Glance view.
On the Apple TV, users gain support for and the ability to group home screen apps into folders. The App Switcher is , and support for iCloud Photo Library has been added along with MapKit availability for developers.
Apple TV will also gain with the forthcoming release of tvOS 9.2.
OS X 10.11.4 includes a handful of new features, like individually encrypted items in Notes, and support for displaying in Messages. It also related to opening links on Twitter via Apple's Safari browser.