This firmware is signed. This means that you can restore to it in iTunes.
Release Date | 31 March 2022 |
Upload Date | 26 March 2022 |
File Name | UniversalMac_12.3.1_21E258_Restore.ipsw |
File Size | 12.92 GB |
SHA256sum | cb0443525571ea5e54aa5a8fd9c52774591892311405183741f4a02f993e18d5 |
MD5sum | 6c943a751207e9e06ab018a7bb568d40 |
SHA1sum | 81033c922c5d43f57907d063fb01865f4c856b37 |
Identifier | iMac21,1 |
cd ~/Downloads
.idevicerestore -e UniversalMac_12.3.1_21E258_Restore.ipsw
and press Enter.