Just today, I plugged in my iPod Classic (bought recently; 160 GB), and it doesn't charge or show up in iTunes. Its screen turns on though.

I have OS X 10.8.5, and the latest iTunes on a MacPro 2008.

I can plug it into my wife's iMac (2011) using the same cable and it seems to work fine.

So I reset the SMC, and the PRAM. I reinstalled iTunes twice, and restarted the mac. The only thing that changed was immediately after resetting the SMC, plugging in the iPod had it show up as connected on its screen for a few seconds, then it said "OK to disconnect" and now doesn't respond any more. I also tried plugging it into the other USB ports, including the ones on the Apple Keyboard.

It looks like the problem is that the Apple Mobile Device Service doesn't start up. I can find Apple's support article on how to reinstall it on 10.6.8 and lower, but that doesn't help. It includes deleting iTunes.app and reinstalling it; 10.8 say you can't do that since iTunes is needed by OS X.

So: how do I get the AMDS working again?

  • How did you reinstall iTunes twice if you can't delete iTunes?
    – Andrew U.
    Jan 31, 2014 at 11:28
  • Go to itunes.com, download the pkg, and run it.
    – Almo
    Jan 31, 2014 at 14:16

2 Answers 2


Did you tried Disk Utility->Repair Permissions ??

To remove iTunes and Apple Mobile Device Service(http://support.apple.com/kb/HT1747) in 10.8 and 10.9, Open Terminal (/Applications/Utilities/Terminal.app) and run these commands (substitute <account name> with your mac login username - you need to be Admin user to run these commands; enter your login password when prompted):

$ sudo mv /Applications/iTunes.app /Users/<account name>/.Trash/

$ sudo mv /System/Library/Extensions/AppleMobileDevice.kext /Users/<account name>/.Trash/

$ sudo mv /Library/Receipts/AppleMobileDeviceSupport.pkg /Users/<account name>/.Trash/

You can then re-install iTunes and try.

  • I suspect this would work.
    – Almo
    Feb 1, 2014 at 19:00

I had a system restore to a previous backup on the go by the time I VDR's answer.

After re-restoring to a backup I made just before the restore, the problem is fixed. So... really not sure what happened. I suspect his answer would have helped.

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