OTA firmwares cannot be restored to. IPSW Downloads collects them for potential future use. They might also be useful if you're doing research.
| ✗ | Apple TV 4K | tvOS 11.0 (15J6381) | September 19, 2017 | 1.4 GiB | 54366cc38b395f5958c0d92afaca9b7297729b98.zip |
| ✗ | Apple TV 4K | tvOS 11.0 (15J381) | September 19, 2017 | 1.4 GiB | 54366cc38b395f5958c0d92afaca9b7297729b98.zip |
| ✗ | Apple TV 4 (2015) | tvOS 11.0 (15J6381) | September 13, 2017 | 1.1 GiB | 1193079b554eda58ec321a5cc09d66283d545787.zip |
| ✗ | Apple TV 4 (2015) | tvOS 11.0 (15J381) | September 13, 2017 | 1.1 GiB | 1193079b554eda58ec321a5cc09d66283d545787.zip |
| ✗ | Apple TV 4 (2015) | tvOS 11.0 (15J5380a) | September 5, 2017 | 1.1 GiB | 013c2a3d77bcf245ce057d79d6f4d369782221dd.zip |
| ✗ | Apple TV 4 (2015) | tvOS 11.0 (15J5378a) | August 31, 2017 | 1.1 GiB | 4c44bb8779a2e11186cd1320da29ae63c0ebed5c.zip |
| ✗ | Apple TV 4 (2015) | tvOS 11.0 (15J5374a) | August 28, 2017 | 1.1 GiB | 48c0def0942ce163f0659816f767b5aa0b916f9d.zip |
| ✗ | Apple TV 4 (2015) | tvOS 11.0 (15J5369a) | August 22, 2017 | 1.1 GiB | d5f73dda88509cbc889076d195926a74c148d10c.zip |