tvOS 11.4 (15L5576a) 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 May 14, 2018 Upload Date May 11, 2018 Filename 0325459d4535e314883f0351c73bcba1fc2cb721.zip Filesize 1.2 GiB Identifier AppleTV5,3
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