iPhone keeps disconnecting from Mac

i have same issue but i find the way to fix it. Try this:

tap Settings > General > Reset > Reset Location & Privacy. This will also reset your location and privacy settings. You can also untrust all computers by tapping Settings > General > Reset > Reset Network Settings on the ipad/iphone

hope you fix it!!

That God I'm not the only one with this problem. I thought I have a defective rMBP. I have this problem with 15" rMBP late 2013 and two iPads. One is iPad 4, the other is iPad Mini 2. I have an iPhone 4s without this issue. Seems like this only happens to my devices with lightning cable.

What I do is switch the cable to other ports until it works. After it is connected I immediately check 'Sync this iPad over WiFi' so I don't need to sync via cable anymore. But this still an annoying issue though. It freak my out the first time I see it. I thought my iPad or Mac is broken.

Hope Apple recognise this issue and do something to fix it.

My rMBP is on Yosemite. Both iPads on iOS 8.

I have this problem with a 1 year old MacBook Air & Retina iPad Mini. It occurred with a genuine Apple lightning cable, I tried rebooting both devices, no help. And never had this problem with an iPhone, either 5, 5s, 4s, or iPods.

Finally I switched to another Apple USB cable, and it worked for a moment then stopped. Finally I switched to a pretty new Amazon cable and it worked fine. But when I disconnected, then brought the iPad back an hour later, suddenly I get the repeating connect/disconnect sequence. If I switch the cable to the other USB port it connects fine. When the bad connections occur I get lots of these errors in Console.

11/5/14 7:53:32.000 PM kernel[0]: Sandbox: com.apple.Safari(3833) deny file-read-data /

This actually worked! In my case, I have a 5K Retina iMac and there would be a problem using any cable (including an old 30 pin plus an adapter) and an iPad Air 2. No problems with iPhone. I nudged the USB cable a little in the iMac and boom, no more crazy disconnect/connect problem.

Wow... so I also tried everything posted here, but after wiggling the USB cable (end connected to my mac) around, and nudging it around... it connected. No idea why. Weirdly, the iPad works with the same cable perfectly on my PC, and my iPhone works with the cable too on PC and Mac. Right...😕

I was having this problem but fixed it by going to

Disk Utility > Verify Disk Permissions and then Repair Disk Permissions.

Good luck!

Great idea ! It works ! 🙂

I have the same problem with my iMac 21.5 2013. My iPad air and iPhone 6 still won't connect, i've used 4 apple USB cables and 3 amazon cable and nothing works. Any solutions?

Running OS X YOSEMITE v. 10.10.1

Ask apple for a new cable.

I've asked apple 3 times, still nothing. All my USB cable works on my pc and Macbook air.

The same problem. MBA 2013 + iPhone 5S.

I've googled this issue and the are TONS of people who are having it. Just look at the number of views of this post.

It seems it can happen to any iOS device connected by any cable (lightning or 30-pin) to a computer with any operation system. And it happens since like the beginning of iOS (I've found posts published in 2008). And there is no solution, just some guesses none of which worked for me.

Apple, what the heck? Are you gonna do something about it?

it is a cable recognition issue.

keep swapping cables to powered ports and the error will not occur.

i was using a keyboard port which was underpowered(overcorrect drawn0 but no current warning occurred..just the MXUSB error

switched to a powered hub and no problem

i am using a non apple micro usb to a battery back charger so apple certified seems not to be the issue

it is under powered usb ports

also the issue re-occurred when the device timed out and locked the screen..

should not happen..but does!

I also have this problem with my rMBP 2013 and my iPad. I tested 3 different cables and all of them didn't work.

I fixed it by using an USB 2.0 Hub (Bus Powered) between the MacBook and the iPad.

The only problem is, that you can't charge your iPad with an USB Hub but you can sync.

This is really annoying. I talked with Apple Support and they said I should replace the MacBook's logic board.

Do you think this could completely solve this issue?

Edit: I found something interesting:

If i launch a VM (Fusion) and connect the iPad directly to the VM, it stays connected. If I then disconnect it from the VM and connect it to OS X (without unplug),

the iPad also stays connected. But if i unplug the cable and reconnect it, the same problem occurs again.

repair permission

This working for me!!! it was so annoying!! I thought it was hardware problem.

I had many lightning cable but won't work,

MBPr 15" late 2013, the port near the card reader does work for my iPad but the one next the magsafe not working.

keep disconnect within a sec, but that port works for my phone 6plus.

after repaired the permission it works again!