~/Library/Preferences/com.apple.itunes.plist
[doublepost=1477512141][/doublepost]Case corrected:
/Users/YourUsername/Library/Preferences/com.apple.iTunes.plist
[doublepost=1477512218][/doublepost]Also the key to delete is: MobileDeviceWakeupTokens
Thank you! I never would have found that. I had 6 values in there. Deleted them all. So far so good. My machine seems to be running like it used to. You're a lifesaver.