Last night, Apple offered developers the third beta ofiOS 10.3. It arrived with only one notable innovation concerning the apps developed in 32 bits (read: iOS 10.3 available, the applications not compatible with iOS 11 already listed?).
At the same time, the Cupertino company released three other pre-versions of its operating systems: macOS 10.12.4 beta 3 for macOS Sierra compatible Macs, watchOS 3.2 beta 3 for Apple Watch and tvOS 10.2 beta 3 for fourth generation Apple TV.
If you have a developer account and have installed the pre-release previous on your Apple computer, you can recover beta 3 of macOS 10.12.4 from the tab Updates from the Mac App Store. It has the build number 16E163f.
For Apple Watch developers, launch the eponymous application on your iPhone and then open the settings to update watchOS 3.2. The beta 3 of tvOS 10.2 can be found in the Apple TV settings.