Mountain Lion Calendar USB Sync Broken After iOS 7.0.4 Update

Its unfortunate but some users have reported that Calendar syncing is once again broken after the recent iOS 7.0.4 update that according to Apple’s release is purported to fix FaceTime issues.

Apparently, it has done more than that.

To fix this you will need to delete plist files from your user LIbrary, that effectively resets iTunes Calendar syncing.

You are strongly advised to perform a backup of your entire system before proceeding to attempt what follows:

1. In Finder hold down alt-Key while choosing the “Go” menu and select Library; within the Library folder;

2. In the folder Calendars delete the following files:

  • Calendar Sync Changes
  • Calendar Cache

3. In the folder Preferences delete the following files:

  • com.apple.CalendarAgent.plist
  • com.apple.iCal.helper.plist
  • com.apple.iCal.plist
  • com.apple.iCalExternalSync.plist
  • com.apple.syncserver.plist¬†

4. Connect your iOS 7.0.4 device to your Mac and commence a sync.

5. Don’t worry if you are ¬†prompted by iTunes to unlock your device if its passcode locked – this is a natural consequence of deleting the files above. Simply unlock your iOS 7.0.4 device and iTunes should now sync your Calendars once again.

Because we deleted the files above, it is natural that the iOS device sync may pause for some considerable amount of time at the calendar sync phase (this varies depending how much calendar data you store both on your Mac and your iOS device).

Be patient and give iTunes time to re-acquaint itself with your iOS device’s calendar and vice-versa.

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