Signed IPSW files can be restored via iTunes. Unsigned IPSWs cannot currently be restored via iTunes.
✓ | macOS 11.1 (20C69) | 14th December 2020 | 13.9 GB | UniversalMac_11.1_20C69_Restore.ipsw |
✓ | macOS 11.0.1 (20B29) | 18th November 2020 | 13.6 GB | UniversalMac_11.0.1_20B29_Restore.ipsw |