Apple on Monday released second betas of what would become the iOS 10.3.2, macOS Sierra 10.12.5, watchOS 3.2.2 and tvOS 10.2.1 software updates. iOS 10.3.2 beta 2 (build 14F5075a), macOS Sierra 10.12.5 beta 2 (build 16F54b), watchOS 3.2.2 beta 2 (build 14V5475a) and tvOS 10.2.1 beta 2 (build 14W5573a) are now available to Apple’s registered developers over the air or as standalone downloads via the Apple Developer Center.
iOS 10.3.2 beta 2 can be installed on an iPhone, iPad or iPod touch in Settings → General → Software Update. On your Mac, macOS Sierra 10.12.5 can be installed through Mac App Store’s Updates tab.
On your fourth-generation Apple TV set-top box, tvOS 10.3.2 beta 2 can be installed in Settings → System → Software Updates → Update Software.
On your Apple Watch, watchOS 3.2.2 beta 2 can be deployed in the Watch app, by tapping My Watch → General → Software Update.
Installing these betas over the air requires an appropriate configuration profile that can be downloaded and installed on a device through Apple’s portal for developers.
iOS/macOS betas are available to the general public via Apple’s Beta Software Program.