IPSW Downloads

iPodOS 4.2.1 - 8C148 for 4th Gen iPod

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

Release DateInvalid Date
Upload Date18 November 2010
File NameiPod4,1_4.2.1_8C148_Restore.ipsw
File Size0.59 GB
SHA256sum0abd3f18779d82349eda5ae6decbeaf2397f3cf8ac39cf740effa46f820bfc8d
MD5sum14d1508954532e91172f8704fd941a93
SHA1sum6a890696126d0cb7f9ccd6b913ecb09cf2029820
IdentifieriPod4,1

Installation Instructions

Windows

  1. Install the latest version of iTunes from the Microsoft Store.
  2. Connect your 4th Gen iPod to your PC.
  3. Open iTunes and navigate to your 4th Gen iPod.
  4. Hold the Shift key and click "Restore".
  5. Select the iPod4,1_4.2.1_8C148_Restore.ipsw file you downloaded.
  6. Wait for the restore to complete and for your 4th Gen iPod to reboot.

macOS

  1. Connect your 4th Gen iPod to your Mac.
  2. Navigate to your 4th Gen iPod in Finder.
  3. Hold the Option or Alt key and click "Restore".
  4. Select the iPod4,1_4.2.1_8C148_Restore.ipsw file you downloaded.
  5. Wait for the restore to complete and for your 4th Gen iPod to reboot.

Linux

  1. Install idevicerestore.
  2. Connect your 4th Gen iPod 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 iPod4,1_4.2.1_8C148_Restore.ipsw and press Enter.
  5. Wait for the restore to complete and for your 4th Gen iPod to reboot.