tvOS 12.3 (16M6153) 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 13, 2019 Upload Date May 7, 2019 Filename 2e137e39de7a3de4baf9e238079e08d0653fbc6c.zip Filesize 1.4 GiB Identifier AppleTV5,3
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