iPod Touch Not Showing Under Devices in Finder
The iPod won't appear under Devices in the Finder, so you're not doing anything wrong.


In Safari on the Mac, first enable the Develop menu by going to Safari > Preferences > Advanced > Show Develop menu in menu bar
Plug the iPod in over USB and launch Safari (on the iPod)
Back on the Mac, go to Safari's Develop menu and you'll have a new menu item for your iPod touch, which lists all of its open Safari tabs in a submenu
Select a tab from that submenu and Safari's Web Inspector will open. You can now debug the page on the iPod touch through the Web Inspector on the Mac