I synced my iPod to my mac and it said that it could not read or write to the disk... it stopped downloading my songs from iTunes and just held there, saying do not disconnect. It wasn't doing anything, stopped putting songs on iPod, even though there were still songs to put on it. Throughout the entire transfer it stopped downloading songs and said syncing to iPod, multiple times. Another note is that it was set to windows, but then iTunes said that it would change it to work better with mac os X, it reset it iPod then synced with iTunes. How can I fix this issue, or do I have to go back and get one meant for macs? d'oh