Signed IPSW files can be restored via Finder, the Apple Devices app, iTunes, or idevicerestore. Unsigned IPSWs cannot currently be restored to.
| ✗ | Apple TV 4 (2015) | tvOS 9.1.1 (13U717) | January 25, 2016 | 930 MiB | AppleTV5,3_9.1.1_13U717_Restore.ipsw | Download |