Archived - iTunes 10.2: "iTunes was unable to load data class information from Sync Services" alert after installing Xcode 4
After installing Xcode 4 on a computer using Mac OS X v10.6.x, you may receive an alert when syncing an iPhone, iPad, or iPod:
To resolve this issue, download and install the latest version of iTunes.
If you are still experiencing this issue when syncing, or have not installed Xcode 4 and get this alert:
- Follow the troubleshooting steps in Mac OS X v10.5, v10.6: Resetting the SyncServices folder.
- If the issue is still unresolved, follow steps in Sync Services: Advanced troubleshooting for contact and calendar syncing.