iPad 4 frequently connects/disconnects from MacBook Pro I have a MacBook Pro (Retina, 13-inch, Late 2013) and an iPad 4. The iPad is freshly installed.

Problem

Whenever I plug it into the left or right USB port of my MacBook, it connects for a fraction of a second (the power indicator on the iPad turns green and iTunes opens), but then it disconnects again. This goes on and on, re-connecting every few seconds.

There's a video of the behavior here:



What I've tried


When I plug it into the Apple keyboard's ports, it is not charging, but now the connection is stable. iTunes also recognizes it properly now.
I've already tried it on another Windows PC, where it works fine. Also, I've tried using another cable – no dice.
Restarting the Mac and the iPad


Other info

Here's what the System Profiler has to say about the MacBook with no peripherals connected:





Is it the internal memory card reader that drains all the required power? But why?

What could I do to make this behavior stop?
After a broad search, I found this solution which worked for me:

On the iPad tap Settings > General > Reset > Reset Location &amp; Privacy. This will reset your location and privacy settings and require you to set up a trust relationship with the PC/laptop again. 

But if you are running out of options ... try that and see if it works. I realize this thread is older, but posting this solution here in case it helps other people.