Apple has released the fourth betas of iOS 10, tvOS 10, watchOS 3 and macOS Sierra for developers. The updates come two weeks after beta 3 was released. These updates are available over-the-air, plus are now available in the member’s centre for download.

• macOS Sierra beta 4 (16A270f)
• iOS 10 beta 4 (14A5322e)
• watchOS 3 beta 4 (14S5302d)
• tvOS 10 beta 4 (14T5308d)
• Xcode 8 beta 4 (8S188o)

There’s no word yet what’s new aside from the usual bug fixes and performance improvements, but stay tuned.

A new version of Xcode 8 beta 4 is also available, plus Safari 10 beta 4 (for OS X El Capitan and Yosemite).