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iPod touch 4

iOS 4.2.1 (8C148) for iPod touch 4

✗ This firmware is not signed. This means you cannot restore to it in iTunes.

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✗ This firmware is not signed. This means you cannot restore to it in iTunes. The instructions below are included for reference only.

Windows

  1. Install the latest version of iTunes from the Microsoft Store.
  2. Plug your iPod touch 4 in to your PC.
  3. Open iTunes, and navigate to your iPod touch 4.
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the iPod4,1_4.2.1_8C148_Restore.ipsw file that you downloaded.
  6. Wait for the restore to complete, and the iPod touch 4 to reboot.

macOS

  1. Plug your iPod touch 4 in to your Mac.
  2. Navigate to your iPod touch 4 in Finder.
  3. Hold the Option or Alt key on your keyboard, and press "Restore".
  4. Select the iPod4,1_4.2.1_8C148_Restore.ipsw file that you downloaded.
  5. Wait for the restore to complete, and the iPod touch 4 to reboot.

Linux

  1. Install idevicerestore.
  2. Plug your iPod touch 4 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 iPod4,1_4.2.1_8C148_Restore.ipsw and press enter.
  5. Wait for the restore to complete, and the iPod touch 4 to reboot.

Windows

  1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
  2. Type Get-FileHash iPod4,1_4.2.1_8C148_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: 6a890696126d0cb7f9ccd6b913ecb09cf2029820. 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 iPod4,1_4.2.1_8C148_Restore.ipsw
  3. The output of the command should match the following checksum: 6a890696126d0cb7f9ccd6b913ecb09cf2029820. 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 iPod4,1_4.2.1_8C148_Restore.ipsw
  3. The output of the command should match the following checksum: 6a890696126d0cb7f9ccd6b913ecb09cf2029820. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum 0abd3f18779d82349eda5ae6decbeaf2397f3cf8ac39cf740effa46f820bfc8d
MD5sum 14d1508954532e91172f8704fd941a93
SHA1sum 6a890696126d0cb7f9ccd6b913ecb09cf2029820
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