tvOS 11.4 (15L5536c) 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 April 3, 2018 Upload Date March 29, 2018 Filename 746e91ec427ce44ea64b2f86dfe1c4595ccce963.zip Filesize 1.4 GiB Identifier AppleTV6,2
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