Update your apps to use new features, and test your apps against API changes.
The tvOS 13.3.1 SDK provides support for developing tvOS apps for Apple TV devices running tvOS 13.3.1. The SDK comes bundled with Xcode 11.3 available from the Mac App Store. For information on the compatibility requirements for Xcode 11.3, see Xcode 11.3 Release Notes.
There are no release notes for this software update.