macOS 11.2.1 (20D74) for Developer Transition Kit

1 Choose a product
2 Choose a device
3 Choose a version
4 Download
Developer Transition Kit

✓ This firmware is signed. This means that you can restore to it in Finder, the Apple Devices app, iTunes, or idevicerestore.

Your download should begin shortly. If it does not, you can download it directly here:

Download (13 GiB)

Windows

  1. Install the latest version of Apple Devices from the Microsoft Store.
  2. Plug your Developer Transition Kit in to your PC.
  3. Open Apple Devices, and navigate to your Developer Transition Kit.
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the UniversalMac_11.2.1_20D74_Restore.ipsw file that you downloaded.
  6. Wait for the restore to complete, and the Developer Transition Kit to reboot.

macOS

  1. Plug your Developer Transition Kit in to your Mac.
  2. Navigate to your Developer Transition Kit in Finder.
  3. Hold the Option or Alt key on your keyboard, and press "Restore".
  4. Select the UniversalMac_11.2.1_20D74_Restore.ipsw file that you downloaded.
  5. Wait for the restore to complete, and the Developer Transition Kit to reboot.

Linux

  1. Install idevicerestore.
  2. Plug your Developer Transition Kit in to your PC.
  3. Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
  4. To perform a full erase restore, type idevicerestore -e UniversalMac_11.2.1_20D74_Restore.ipsw and press enter.
  5. Wait for the restore to complete, and the Developer Transition Kit to reboot.

Windows

  1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
  2. Type Get-FileHash UniversalMac_11.2.1_20D74_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: e86a28704fc5e46feeaa118660bb8dece33a936d. If it doesn't, you may need to redownload the file.

macOS

  1. Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
  2. Type openssl sha1 UniversalMac_11.2.1_20D74_Restore.ipsw
  3. The output of the command should match the following checksum: e86a28704fc5e46feeaa118660bb8dece33a936d. If it doesn't, you may need to redownload the file.

Linux

  1. Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
  2. Type openssl sha1 UniversalMac_11.2.1_20D74_Restore.ipsw
  3. The output of the command should match the following checksum: e86a28704fc5e46feeaa118660bb8dece33a936d. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum6d16fe550707f8644abf1178d581efc6cba59ef0ff8fa9180d8736370bc99680
MD5sum6d16fe550707f8644abf1178d581efc6cba59ef0ff8fa9180d8736370bc99680
SHA1sume86a28704fc5e46feeaa118660bb8dece33a936d
Bluesky Mastodon r/jailbreak Twitter