- Plug in Ipod
- Open Itunes (assuming that you have updated to the newset version)
- Once opened you will see two tabs in the top right corner. A tab named 'Ipod' and 'Itunes Store'
- Click Ipod
- You'll then see your Ipod and some general information
- On your left hand side you will see iOS (version) underneath will say 'Update' and 'Restore Ipod...'
- Click 'Update'
- Agree to terms
I hope this answered your question
Connect the iPod to your computer and update via iTunes
A 1G iPod can go to iOS 2.2 via iTunes and iOS 3.1.3 via
A 2G to 4.2.1. Requires iTunes version 10.X. If a Mac it requires OSX 10.5.8 or later. With 1OSX 10.4.11 you can only go to iTunes 9.X which gets you as high as iOS 4.1
A 3G to 5.1.1 Requires iTunes version 10.5 or later
A 4G to 6 Requires iTunes version 10.7 or later. For a Mac, that requires a Mac with OSX 10.6.8 or later