tvOS 12.3 (16M5139a) 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 April 22, 2019 Upload Date April 19, 2019 Filename c90fcde83dfce75b1b05df4da32be1f3ecef3ee1.zip Filesize 1.4 GiB Identifier AppleTV5,3
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