
TIP: do not sync "subscribed" calendars on your devices by selecting them from the calendar sync section under the info tab in your iphone/ipad sync settings within iTunes. Started to re-occur once I tried syncing "subscribed" calendars to my iPhone and iPad. Update: After I fixed my my issues, the duplication problem Re-subscribe to any caldav calendars you need (see notes about subcription calendars at bottom)Īt this point, my problems were solved and I've been in good shape since. Log back into me.com and verify that your MobileMe calendar should look good now and include the correct calendar items.Ģ3. When prompted, replace info on MobileMe with data "from this computer".Ģ2. This time, go to "advanced settings" and +reset sync history+. Go to system preferences (yet again), and log into MobileMe. ics backups and verify that your iCal looks the way you want it.Ģ1. Now, log out of this test level user account and log back in to your primary account.Ģ0. Once verified that your MobileMe calendars are cleared, return to Mobile Me system preferences and log out of MobileMe.ġ9. You can verify this by logging into me.com after the sync is completed.ġ8. Select "from Mac (iCal)." Because you are in this new user account with blank calendars in iCal, this will remove any and all calendars currently on MobileMe. You should get a prompt to sync using data from either iCal on your Mac or from Mobile Me. Go to the sync tab, and for now, choose sync manually (adjust this to automatically or whatever you like after the fix is in). Go to system preferences and launch MobileMe settingsġ7.

Verify that you should have two blank calendars, home & work.ġ5. Log out of your primary user account and log into this new test accountġ4. Create a new administrator level account (call it test or whatever you like)ġ2. Return to system preferences and go to Accountsġ1. (If you have exported backups of what you want, this should not be an issue).ġ0.

If you feel comfortable with it, go ahead and delete everything else in this directory. In Finder, go to your home directory > library > calendarsĩ. Delete all the calendars from iCal (after you have successfully exported backups).Ĩ. ics backup file *for each* of your cleaned up calendars (File > Export > Export).ħ. Once iCal looks like it should, *perform a backup*.Ħ. (Temporarily) remove any subscribed calendarsĥ. Go to iCal and clean up everything you can, delete duplicates and any other problem items. Attempt logging back into MM within system preferences by entering a false user id and false password (this will return a invalid login response but it will clear out any bad metadata).ģ.

First, go to MobileMe settings within system preferences and log out of MobileMe.Ģ.

To fix the duplication problem, do the following: (needless to say, proceed at your own risk and backup).ġ. The duplication problem, while the root cause was not entirely identifed, appears to lie somewhere in your Mac's user account and the iSync application. I've summarized the steps taken to resolve my issue below. I chatted with a MM rep and after no luck and the issue was escalated to a senior MobileMe rep who exchanged a few emails with me and helped solve the problem. At one point I had over 500 copies of my "home" calendar that would keep replicating even after I deleted them. Lots of duplicated events, alarms, and even started getting duplicate calendars.
