I found two solutions on Apple Support Communities. Apple's solution is first. That didn't work for me. The second method worked for me on two computers and three devices. And no side effects so far, i.e. Time Machine is fine. It is not Apple's recommended method.
- Apple solution:
defaults delete com.apple.SyncServer SyncServicesResetWorldRunOnce
1.2 Reboot your computer.
1.3 Unplug and reconnect your device(s)
See this link for the article
- Hatchet solution
2.1. Go to ~/Library/ApplicationSupport
2.2. Find the folder SyncServices
2.3. Delete it.
2.4. Reboot your computer
2.5. Unplug and reconnect your iOS device(s).
Hope this helps others.