Before you connect your iPod to your Mac, you must ensure that iTunes won't attempt to sync with your iPod. If it does, it might delete all of the data on your iPod. Why? Because at this point, your iTunes library is missing some or all of the songs or other files on your iPod. If you sync your iPod with iTunes, you'll end up with an iPod that's missing the same files that your iTunes library is missing.
Disable Syncing
- Press and hold the Command + Option keys while you plug in your iPod. Don't release the Command + Option keys until you see your iPod display in iTunes.
- Confirm that your iPod is mounted in iTunes and on your Mac's desktop.

