IPSW Downloads

macOS 12.1 - 21C52 for iMac

This firmware is signed. This means that you can restore to it in iTunes.

Release Date13 December 2021
Upload Date08 December 2021
File NameUniversalMac_12.1_21C52_Restore.ipsw
File Size13.17 GB
SHA256sum8d3863cd4a09d5cfd75c4a3e61f7605d800f653b5ecd6e8628b19a44de6a67b0
MD5sumf372884892c445b80993250b65f6bebb
SHA1sum04421498d4e6e031f2269c988a2663ebacb774e4
IdentifieriMac21,1

Installation Instructions

Windows

  1. Install the latest version of iTunes from the Microsoft Store.
  2. Connect your iMac to your PC.
  3. Open iTunes and navigate to your iMac.
  4. Hold the Shift key and click "Restore".
  5. Select the UniversalMac_12.1_21C52_Restore.ipsw file you downloaded.
  6. Wait for the restore to complete and for your iMac to reboot.

macOS

  1. Connect your iMac to your Mac.
  2. Navigate to your iMac in Finder.
  3. Hold the Option or Alt key and click "Restore".
  4. Select the UniversalMac_12.1_21C52_Restore.ipsw file you downloaded.
  5. Wait for the restore to complete and for your iMac to reboot.

Linux

  1. Install idevicerestore.
  2. Connect your iMac to your PC.
  3. Open a terminal and navigate to the IPSW file you downloaded, e.g., cd ~/Downloads.
  4. To perform a full erase restore, type idevicerestore -e UniversalMac_12.1_21C52_Restore.ipsw and press Enter.
  5. Wait for the restore to complete and for your iMac to reboot.