Link. Sync is hell. “10.7.4. That release included a bug that prevented iCal from properly syncing with Sync Services, and therefore with Sync Services clients like Spanning Sync, BusySync, Blackberry Sync, and many others. We’ve been in touch with Apple, and it doesn’t appear they intend to fix the bug.

Instead, they’ve suggested we move to the more modern CalendarStore and Address Book frameworks. But this would require a major rewrite, which, given the dwindling need for a third-party solution to sync Apple and Google calendars and contacts, isn’t economically feasible for us.”