iPhone connects and disconnects from Mac

airplane mode solved the problem for me

You will not believe me, but I noticed that when my phone has more than 60% of the battery charge this problem is not exists anymore ... it's very strange, I checked several times ...

Waiting for a new cable for the dough.

Geez. Reading through all comments and trying all things. ((I've already experienced my iPhone8s working well with a cable and then at work, it won't charge with the same cable while other people could. Something funky there already.))

My brand new Air was connect/disconnecting repeatedly when I plugged in my iPhone. (1 cable played dead the whole time.) I tried an Anker, Amazon and old Apple cable with no luck. A Belkin cable was the one that allowed me to break through the on/off cycling. ((Battery on phone is 51%, but doubting that matters.))

Now going to try to muck with iTunes settings now that my phone is actually connected. smh

The same thing happened to me just yesterday. However, I found that the problem "fixed" itself by simply accessing my network settings without changing anything. Very strange. I guess this very loosely validates the quantum Hawthorne effect of "observe a system and change it".

Guys

I have been having this issue for months, maybe years! (actually I ignored it so much since it happens very rarely to be really useful to connect my iCloud-based devices to my Mac).

After having tried almost everything (flag in network settings for USB iPhone, killing that process.. CHANGIG CABLE! god, how many cables I did change!!), i just realised that the "true" answer is this one:

Your device should be "sufficiently charged". IF the battery is too low the usb port of your computer is not able to feed it as needed, and the connection is lost.

If you have a look at these posts, in fact, it would seem that the problem affects in particular laptops, more than iMac and so on..

So guys.. sad enough Apple did not allow us to "power up" that USB, but at least we have a solution!

p.s. in my case the problem was with iPhone 7Plus, iPhone XS Max, iPad Pro 9.7 with a 2016 topped up MacBook Pro (latest before Touch Bar)

cheers, and thanks to the repliers!

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.

Just turned off iPhone and connect.

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

Hey guys,

I wrote a small .sh file (a .command, really) to address this issue. It works great. See here:

https://gist.github.com/osfunapps/bf5ced177302e13fd2a2fa387773b7fd

Thanks,

Oz.

I'm having this problem too, on an iPhone 7 connecting to a MacBook Pro, both with all software updates installed.

One thing I notice is that the phone very quickly flashes a pop-up ("modal") asking if I should trust this computer or not. But it's gone before I have a chance to press "Yes". (Actually, I once got it in time, and a screen for me to enter my PIN appeared, but only for a microsecond.) The connect/disconnect also stops briefly when the laptop pops up that "A new network interface has been detected: the 'iPhone USB' network interface has not been set up. To set up this interface use Network Preferences". But no matter what I do next, the cycle starts again.

The phone connects correctly to an older iMac running 10.7.5, so I suspect the issue is with the software on the laptop, but perhaps is a cycle of each wanting to verify that I should trust the other and getting in each other's way?