This firmware is not signed. This means you cannot restore to it in iTunes.
| Release Date | 25 October 2021 | 
| Upload Date | 15 October 2021 | 
| File Name | iPad_Pro_A12X_A12Z_15.1_19B74_Restore.ipsw | 
| File Size | 6.06 GB | 
| SHA256sum | d8d6680983164557041d81b10126061f4fba8cbf0c1ec7e833b4a20ca1a7c5c3 | 
| MD5sum | 5c2203cf0ded8d582f09d59dead6d3ae | 
| SHA1sum | f9e1021de57be00dbfa141a57fc69fb47b60f3dd | 
| Identifier | iPad8,5 | 
cd ~/Downloads.idevicerestore -e iPad_Pro_A12X_A12Z_15.1_19B74_Restore.ipsw and press Enter.