tvOS 12.3 (16M5139a) 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 22, 2019 Upload Date April 19, 2019 Filename 11f1845b6a981e648694a29094d800e440188819.zip Filesize 1.6 GiB Identifier AppleTV6,2
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