In addition to iOS 9.3.2, Apple on Monday released OS X 10.11.5, watchOS 2.2.1 and tvOS 9.2.1 to the public. You can find the updates in the Mac App Store, in the iOS Watch app, and by navigating to Settings > System > Software Updates > Update Software on your fourth generation Apple TV.
From what we saw in the various developer and public betas for the above updates, none of them are going to include any significant user-facing changes. They're mostly maintenance releases, featuring bug fixes and other improvements aimed at ironing issues noticed in previous software versions.
Apple on Tuesday seeded brand new betas of the iOS, tvOS and OS X operating systems to members of the Apple Developer Program. iOS 9.3.2 beta 4 (build 13F68), tvOS 9.2.1 beta 4 (build 13Y772) and OS X El Capitan 10.11.5 beta 4 are all available for download on devices running earlier betas. Standalone installers can be downloaded through Apple's Dev Center for developers and are also available for public testing for members of the Apple Beta Software Program.
Just 24 hours after iOS 9.3.2 beta 3 released to Apple's registered developers, the Cupertino company on Wednesday made the software available to public beta testers who are signed up for the Apple Beta Software Program. In addition, Apple posted new betas of tvOS 9.2.1 and OS X El Capitan 10.11.5 for members of its Apple Developer Program.
The new tvOS 9.2.1 beta 3 (build 13Y768) and OS X El Capitan 10.11.5 beta 3 (build 15F28b) can be obtained via Apple's portal for developers.
After seeding iOS 9.3.2 beta 2 to its registered developers this morning, Apple has also released new betas for its other forthcoming operating system updates: watchOS 2.2.1 and OS X 10.11.5 El Capitan. You can download watchOS 2.2.1 beta 2 (build 13V420) and OS X 10.11.5 beta 2 (build 15F24b) through Apple's Developer Center, which requires a paid account for full access, or apply them on the devices themselves through the Software Update mechanism on devices running a beta OS.
In addition to iOS 9.3.2 and watchOS 2.2.1, Apple on Wednesday released the first beta for tvOS 9.2.1 to developers. To update, you'll have to connect your Apple TV 4 to a computer and install the software via iTunes or Apple Configurator.
Todays release comes two weeks after Apple pushed out tvOS 9.2 to the public. That was a significant update, bringing about several user-facing changes such as support for app folders and Bluetooth keyboards, as well as new Siri features.