This firmware is signed. This means that you can restore to it in iTunes.
Release Date | 13 December 2021 |
Upload Date | 08 December 2021 |
File Name | UniversalMac_12.1_21C52_Restore.ipsw |
File Size | 13.17 GB |
SHA256sum | 8d3863cd4a09d5cfd75c4a3e61f7605d800f653b5ecd6e8628b19a44de6a67b0 |
MD5sum | f372884892c445b80993250b65f6bebb |
SHA1sum | 04421498d4e6e031f2269c988a2663ebacb774e4 |
Identifier | MacBookPro18,3 |
cd ~/Downloads
.idevicerestore -e UniversalMac_12.1_21C52_Restore.ipsw
and press Enter.