Some users may experience an issue when attempting to update the firmware on their iPods where the firmware file cannot be found or is found to be corrupt.
If your iPod software update cannot be found or is corrupt, meaning that iTunes could not update or restore your iPod, you can delete the iPod software update files. iTunes will then be able to download a fresh copy of the latest firmware update from Apple, and you should then be able to install it.
According to a recent knowledgebase article from Apple, follow these steps to delete the files:
- Eject your iPod and quit iTunes.
- Use Disk Utility (Applications > Utilities) and verify your hard disk. This will ensure no inherent problems exist on your drive that could be affecting your ability to update your iPod.
- Once your disk is verified, quit Disk Utility.
- Open a Finder window and navigate to (username > Library > iTunes > iPod Software Updates)
- Drag the iPod Software Updates folder to your Trash.
- Be sure you have a solid Internet connection, connect your iPod, and open iTunes. Download the latest software update by clicking Update from the iPod settings page.