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iPad 1

iOS 4.2.1 (8C148) for iPad 1

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

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Download (578 MB)

✗ 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 iPad 1 in to your PC.
  3. Open iTunes, and navigate to your iPad 1.
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the iPad1,1_4.2.1_8C148_Restore.ipsw file that you downloaded.
  6. Wait for the restore to complete, and the iPad 1 to reboot.

macOS

  1. Plug your iPad 1 in to your Mac.
  2. Navigate to your iPad 1 in Finder.
  3. Hold the Option or Alt key on your keyboard, and press "Restore".
  4. Select the iPad1,1_4.2.1_8C148_Restore.ipsw file that you downloaded.
  5. Wait for the restore to complete, and the iPad 1 to reboot.

Linux

  1. Install idevicerestore.
  2. Plug your iPad 1 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 iPad1,1_4.2.1_8C148_Restore.ipsw and press enter.
  5. Wait for the restore to complete, and the iPad 1 to reboot.

Windows

  1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
  2. Type Get-FileHash iPad1,1_4.2.1_8C148_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: 8717b3bedc925b587566442ad375aa65d857e79a. 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 iPad1,1_4.2.1_8C148_Restore.ipsw
  3. The output of the command should match the following checksum: 8717b3bedc925b587566442ad375aa65d857e79a. 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 iPad1,1_4.2.1_8C148_Restore.ipsw
  3. The output of the command should match the following checksum: 8717b3bedc925b587566442ad375aa65d857e79a. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum 8417eeccd664a089a6b4a3b91cb7ec88753cc6f320a192bf38fb8c6ffe29665b
MD5sum 9402d5f05348fd68c87f885ff4cb4717
SHA1sum 8717b3bedc925b587566442ad375aa65d857e79a
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