Itunes could not connect to this ipad. you do not have permission

Back up all data.

Triple-click anywhere in the line below on this page to select it:

/var/db/lockdown

Right-click or control-click the highlighted line and select

Services ▹ Reveal in Finder (or just Reveal)

from the contextual menu.* A folder should open with an item selected. Move the selected item to the Trash. You may be prompted for your administrator login password. Restart the computer and empty the Trash.

*If you don't see the contextual menu item, copy the selected text to the Clipboard by pressing the key combination command-C. In the Finder, select

Go ▹ Go to Folder...

from the menu bar and paste into the box that opens by pressing command-V. You won't see what you pasted because a line break is included. Press return.

Was sync working at first after you deleted the lockdown folder? Was the folder recreated?

I had this problem. Although it doesn't seem to be rare, I could not find a solution. Apple support was little or no help. However, I have fixed the issue.

As has been suggested, the problem is in the /var/db/lockdown folder. However, as has been suggested, you cannot delete individual files from this folder because they are locked by _usbmuxd. You will see files with names corresponding to devices you have synched with iTunes. Sure enough there was one for my iPhone and one for my iPad. The phone synched just fine but the iPad would not. It would synch with iTunes for Windows and with an older iMac.

It would refuse to connect with my Mac Book Pro.

The solution is to move the "lockdown" folder to the trash. The files in the folder are locked, but the folder itself is not. I then created an empty folder called "lockdown."

Next I restarted the computer and ran "Repair Permissions." This repair to a very long time, but the last item in the log window said "Repaired var/db/lockdown folder." I reconnected the iPad and tapped trust. I then opened iTunes and connected to the iPad. All functions are normal. The var/db/lockdown folder now has a new file for the iPad.

Hope this helps.

I did all the things above and now when I connect my iPad I get an error message that says this: iTunes could not connect to this iPad. Could not allocate a resource. Please help! I have no idea what to do now.

I did all the things above and now when I connect my iPad I get an error message that says this: iTunes could not connect to this iPad. Could not allocate a resource. Please help! I have no idea what to do now.

You might try the terminal commands discussed in the link below. I tried connecting to an older iMac to make a backup in case my deletion of the folder discussed above failed. I got another error message similar to yours and I tried the procedure outlined in the link. It worked.

One of the problems I've had is that Apple Support does not know what the solution is. They were extremely helpful, but they didn't know what to do.

When I called them back to let them know I found a solution, they said they would refer it to the engineers for study. They promised to get back to me, but it has not happened yet.

If a missing folder or incorrect permissions prevents iTunes authorization - Apple Support