iPhone Calendar Sync Issues Reloaded

This week it happened again: The calendar synchronisation between my iPhone and MacBook did not work.

The last time it was sufficient to delete the calendar cache file "~/Library/Calendars/Calendar Cache", but this time that didn't work. I tried to delete the cache, exported and re-imported the whole calendar archive, deleted all calendars on the iPhone, tried to replace all calendar data on the iPhone via iTunes, etc.

Nothing worked until I found this Apple support thread that led me to this knowledge base article. They suggested to reset the SyncService which I did in combination with deleting some more temporary files. :D

Here is what I deleted:

  • ~/Library/Caches/com.apple.CalendarAgent/Cache.db
  • ~/Library/Caches/com.apple.iCal
  • ~/Library/Calendar/Calendar Cache
  • ~/Library/Calendar/Calendar Sync Changes/
  • ~/Library/Preferences/com.apple.CalendarAgent.plist
  • ~/Library/Preferences/com.apple.iCal.helper.plist
  • ~/Library/Preferences/com.apple.iCal.plist
  • ~/Library/Preferences/com.apple.iCalExternalSync.plist
  • ~/Library/Preferences/com.apple.syncserver.plist

In general I deleted everything that seemed to be connected to the synchronisation service or the calendar in the "~/Library/", "~/Library/Preferences/" and "~/Library/Caches/" folders. (I think I don't have to mention that it is recommended just to move the files and move them back in case they were necessary. ;) )

Afterwards I resetted the SyncService by executing the following command in Terminal:/System/Library/Frameworks/SyncServices.framework/Versions/A/Resources/resetsync.pl full

Just to be sure I rebooted the machine and then I had to turn on the synchronisation options for contacts and calendars in iTunes. A few tests later I can say: It is working again. :smile:

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