tvOS 11.3 (15L5208a) for Apple TV 4 (2015) ✗ This OTA is not signed. OTA firmwares cannot be restored to. IPSW Downloads collects them for
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Release Date March 13, 2018 Upload Date March 9, 2018 Filename be16b25d681790a46d31a4e247473c12c278ec44.zip Filesize 1.2 GiB Identifier AppleTV5,3
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