tvOS 11.3 (15L5198d) for Apple TV 4K ✗ This OTA is not signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
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Release Date March 5, 2018 Upload Date March 1, 2018 Filename a9da059f548303d7d5ba12cd9443f9efdb2da53c.zip Filesize 1.4 GiB Identifier AppleTV6,2
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