ok, this worked for me:
1. Remove "iTunes" from your dock
2. Empty The trash bin
4. Install (reinstall effectively)
5. Connect your device.
I also turned off all devices (Airplane mode is fine) before starting any of this - not sure it helped, but it didnt hurt.
Hope that that works!
Problem is on the Mac OS .
I have on my Macbook a virtual Windows 7 partition and no problem to sync my Iphone 4S (IOS 6.1) with Itunes 11.
I am having problems on MAC OS to backup my Iphone since Itunes 10 but syncing was working fine; now it's worse.
Never had problems with Windows 7 backup or syncing on the same Mac.
Apple should work on this.
I had this issue after I updated my IOS devices to version 7 and had to reinstall the the operating system to my MacBook Pro for unrelated reasons. I did reinstall iTunes as suggested, but through trial and error realized that there was one more step. iTunes asked me if I wanted to allow it to control the IOS devices and respond on the IOS devices. Once I did that, the problem was solved. Apparently, iTunes wants a handshake with the IOS device.
I tried to install Itunes again but I don't see this step you are talking about.
What I noticed is that when Itunes cannot connect to the Iphone, other applications like Diskaid or Itools are not able to connect (Diskaid says that my device is password protected and exists but it is not, and Itools does not even see the iphone). When i install Itunes again, all applications work until I reboot the macbook. Something seems to lock the iphone - is this a driver problem with Itunes? If so, it's a MacOs driver issue because on Windows, everything is fine.
It seems that you issue is different than the one I encountered. I found the following post from last year and tried this first and it did not work:
- Disconnect all iOS devices from your computer and quit iTunes.
- From the Finder, choose Go > Go to folder.
- Type the following and then press Return:
- Choose View > as Icons.
- The Finder window should display one or more files with long alphanumeric file names.
- In the Finder, choose Edit > Select all. Then, choose File > Move to Trash. Enter an administrator password if prompted.
Note: Do not delete the Lockdown folder itself. Delete only the files contained inside the Lockdown folder.
- Reconnect your iOS device and open iTunes."
I had an Apple Support representative sharing the screen with me when I reinstalled iTunes and fixed the issue with my computer. She said she was not familiar with this issue but would talk to her supervisors. Clearly yu can get this error message for more than one reason.
On my Mac I went to the apple symbol, clicked on sofware update, there were 3 for my macbook pro retina (new last week), I installed them and the problem went away.
i'm now on 10.8.5 if that means anything
no I havent rebooted it to see if anything changes. but it required a restart with the sofware update.