This firmware is signed. This means that you can restore to it in iTunes.
Release Date | 09 February 2021 |
Upload Date | 06 February 2021 |
File Name | UniversalMac_11.2.1_20D74_Restore.ipsw |
File Size | 12.76 GB |
SHA256sum | 6d16fe550707f8644abf1178d581efc6cba59ef0ff8fa9180d8736370bc99680 |
MD5sum | 2f0f899d9eb35e84faac2134c3e0754f |
SHA1sum | e86a28704fc5e46feeaa118660bb8dece33a936d |
Identifier | MacBookPro17,1 |
cd ~/Downloads
.idevicerestore -e UniversalMac_11.2.1_20D74_Restore.ipsw
and press Enter.