tvOS 11.2.1 (15K6152) 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 December 13, 2017 Upload Date December 10, 2017 Filename b107afae9d9d6f1a066a77f00f77d72bbd144ca9.zip Filesize 1.1 GiB Identifier AppleTV5,3
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