I was going crazy trying to figure this out. I am sure I still will when I try to delete gmail but I use gmail for my calendars. My work iMac was syncing with iCal just fine to my work iMac. I am trying to import gmail to iCal, then use iCal to sync to iCloud and then hopefully delete gmail altogether. I think since I was at work that my home iMac is on as well with iCloud so I think that is why I keep getting my dup appointments. Hopefully once I get home I can change the settings on that computer and everything will be ready to go. This importing calenders should not be this hard! Good luck to all!