Who doesn’t battle the Apple Sync Services dragon on a semi-regular basis? Here are a couple of examples from Apple Support about how to resolve problems with this very useful yet unfortunately flawed feature: Mac OS X 10.5: Resetting the SyncServices folder Sync Services: Advanced troubleshooting for contact and calendar syncing There are even more support articles around the web, although I think you get the picture. Let’s be clear, syncing any type of data is not trivial.
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Slay Sync Services Dragons with Spanning Tools