Apple has released tvOS 13.4.8 Beta 3 (17M5558b) to registered developers along with the beta releases of iOS & iPadOS 13.6 Beta 3 (17G5059c) and macOS Catalina 10.15.6 Beta 3 (19G60d).
The latest beta of tvOS 13.4.8 comes after three weeks after beta 2 and a month after the release of 13.4.5.
Beta 3 includes bug fixes and system performance improvements, with no new major features included.
You can install the third beta of tvOS 13.4.8 through a beta profile installed on the Apple TV using Xcode.
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