iPhone connects and disconnects from Mac

If you are running a VM: make sure your iPhone is connected specifically to the Mac. In VMWare Settings > USB & Bluetooth:

I forgot to add even after updating you mobile to latest version you need to reset your location and privacy settings...

Update - after reading through all of the replies I decided to try charging both devices fully AND use a newer shorter lightning cable. For whatever reason this worked and all is good.

airplane mode solved the problem for me

Try Force Quitting the USBd process on your Mac.

1. Open Activity Monitor on your Mac (in Applications>Utilities)
2. Search in the search bar for USBd
3. Double click on USBd and Quit / Force Quit the process.

Hopefully your phone should then charge normally.

I have no idea what this USBd process is and you try this at your own risk - just saying it worked for me with no problems. The phone charged and sync'd perfectly with itunes afterwards

Hy everyone.

I had same issue on my iphone 6, ios 9.3.2. After searching through the web i found following solution that helped me:

You need to reset your privacy and location info and then trust your iphone with itunes again.

1. Disconnect your iphone from cable.

2. On your iphone: ->Settings -> General -> Reset -> Reset Location & Privacy (accept all things).

3. Connect your iphone back to cable. (iphone will reconnecting again, don't worry, it will be soon over).

4. iTunes will ask about trust, accept all this.

After that your iphone should stop reconnecting repeatedly and start to charging normally.

Thanks for the tip.

However in the above scenario my Macbook was jumping from any desktop i tried to work in back to the desktop where I was running iTunes. By the time I had selected any other app (terminal included) I was thrown back to iTunes because it wanted to show me a message. I never saw this message because it got hidden behind the iTunes window. I only discovered the message after taking a guess at what was going on. So with terminal I would have had no chance to type anything, because as soon as I selected the correct desktop (where I keep terminals assigned) I would not get the time to even select the terminal let alone be able to type something into it. It would be far better if this message (regards trust) was thrown up in the notifications sidebar where it would have less influence on the behaviour of Apple's display manager. But seeing Apple have done nothing to improve the display manager with regard to the reliable positioning of apps on desktops I don't expect a change in this area either - a means to interrupt the display manager when it goes berserk - not even being able to reboot via the applet on the top left of the screen. My only solution was to log in from another computer and reboot.

At this point (remote terminal via SSH) using "sudo killall -STOP -c usbd" would have saved me rebooting.

I'm having the same issue here but just with my husband iPhone 7 Plus. Mine works pretty fine but it's an iPhone 6.

MacBook Pro Retina, 13-inch, Mid 2014 - MacOS Mojave 10.14.3 with iTunes 12.9.2.5

iPhone 7 Plus iOS12.1.4

iPhone 6 iOS 12.1.4

Apple lightning cable

One thing that I've noticed is that killing usbd via Activity Monitor worked here but it turned the personal hotspot on in the iPhone 7 Plus. And when I turned the personal hotspot off, the issue restarted immediately. Have anyone noticed that too?

I solved this by connecting my iPhone 6 at the same time. My Macbook only connect to the Xs Max whenever I plugin the iPhone 6, eject the 6 then happen again.

Totally not expect this. Lmao. What feature is this?

I have had that problem for quite a while. I change some settings following different advices given here and there, which had annoying consequences like Google Maps loosing the navigation option, I used a new USB cable, then finally, I used my brain: if your laptop is fully charged 100% or connected to the charger, the phone will stay connected, if the laptop charge is not enough, the laptop will disconnect your iPhone that will reconnect and get disconnected again and so on, with that annoying sound at each step. So the conclusion is: don't try to charge or connect your phone to your laptop if the battery is not fully charged.

I had the same issue. My phone keeps beeping and my internet doesn't work on macbook air. I don't have iphone usb either on my network setting.

I solve my problem by following this video. https://www.youtube.com/watch?v=Trl0kmxxRRc

I had the same problem with similar hardware: Mac book air 13-inch 2017 and iPhone XS.

None of the software tricks helped. However cleaning the magsafe connecter female solved the problem. Seems to have been an electrical / equipment grounding problem.

I was having the same problem but I solved it by using another cable. The way you connect your phone to computer matters too. You should connect the cable to the computer first before connecting your phone on the other end.

I hope that helps.

I came across this yesterday with my daughter's 8 month old MacBook Air and iPhone 7. When she plugged it in it constantly connected/disconnected. We tried

• multiple lightning cables
• multiple ports on her MacBook
• her phone charges fine with the same cable when plugged into the wall
• her phone and same cable works fine when plugged into another MacBook Air
• My Galaxy S7 charges ok when connected to her MacBook Air
• My brand new iPad also has the same connection issue when connected to her MacBook
• We then tried a different lightning cable that came with my iPad which appears to be slightly thicker, it charged both the iPad and her iPhone OK on her MacBook!
• I later found that if her phone was charged at 71% any of our lightning cables would charge it, when her phone was at 23% only my iPad cable would charge it.
• The iPad still wouldn't charge with the older lightning cable even when at 81%

So I'm thinking that an iPhone that is "more" flat may draw a higher charging current from the USB port. Not sure if the older cables are slightly worn out/ damaged and cannot provide the current, or there is some other tolerance problem, but a newer cable worked for us. That doesn't really explain why it worked with a low battery percentage on another MacBook though with the original cable. There is something weird going on.

Had the same issue. Tried killing usbd process and the issue persisted. Replacing the cable fixed the issue.