IPSW Downloads

iPadOS 4.2.1 - 8C148 for iPad

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

Release DateInvalid Date
Upload Date18 November 2010
File NameiPad1,1_4.2.1_8C148_Restore.ipsw
File Size0.54 GB
SHA256sum8417eeccd664a089a6b4a3b91cb7ec88753cc6f320a192bf38fb8c6ffe29665b
MD5sum9402d5f05348fd68c87f885ff4cb4717
SHA1sum8717b3bedc925b587566442ad375aa65d857e79a
IdentifieriPad1,1

Installation Instructions

Windows

  1. Install the latest version of iTunes from the Microsoft Store.
  2. Connect your iPad to your PC.
  3. Open iTunes and navigate to your iPad.
  4. Hold the Shift key and click "Restore".
  5. Select the iPad1,1_4.2.1_8C148_Restore.ipsw file you downloaded.
  6. Wait for the restore to complete and for your iPad to reboot.

macOS

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

Linux

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