Signed IPSW files can be restored via iTunes. Unsigned IPSWs cannot currently be restored via iTunes.
✓ | iPadOS 17.5.1 (21F90) | 20th May 2024 | 7.78 GB | iPad_Spring_2024_17.5.1_21F90_Restore.ipsw |
✗ | iPadOS 17.5 (21F84) | 14th May 2024 | 7.78 GB | iPad_Spring_2024_17.5_21F84_Restore.ipsw |