Download macOS 12.3.1 for iMac 24-inch (M1, Four Ports, 2021) (iMac21,2)

Signed IPSW files can be restored via iTunes, 3uTools. Unsigned IPSWs cannot currently be restored via iTunes, 3uTools.

Signed status can change daily, you should check signed status before restored

Firmware information
  • File name
  • Version
    macOS 12.3.1 This firmware is signed. You can restore to it
  • Build ID
    21E258
  • Size
    12.92GB
  • Release date
    2022-03-31 17:25:26
  • Upload date
    2022-03-26 19:16:07
  • MD5
  • SHA1
  • SHA256
Mac iMac 24-inch (M1, Four Ports, 2021) iMac21,2
* Apple server is official from Apple. Other links are re-upload to other hosts.