I am having some difficulty trying to have my Ipod 4 to synch with my iMac 10.6. I don't want to upgrade iTune 10.7 to 11. However, every time I boot up iTune comes up with a -4899 error message. I checked to see which version I still have and sure enough it shows 10. But once I connect my iPod then I get a message that I need to restore to factory setting which will force me to go to V.11. I have in TM iTune V.10.7 I tried to restore iTune from TM but apparently is not taking it. At the moment my iPOD is useless when it comes to synch calendar, uploading files.