iPhone keeps disconnecting from Mac

I found a solution.

When my iPhone was fully charged... it worked. No cable issues.

When my iPhone was in 90% of the charge, it worked but not at all.

But with less charge it connects and disconnects, so it's unusuable. With the wall there's no problem.

So... the problem is with the battery of the iPhone? It doesn't send enough signal for the Macbook to respond?

And another new problem... my iPhone today stopped working. In the store they said it could be the battery.

So the answer is provably a battery issue. I live in Argentina, so the Apple Stores are not good... I didn't get a device replacement, they will try to repair it and the service is very expensive.

Anybody in a similar situation?

Thanks

Same here. 2 different ports, different cables and 2 different iPhone 6s's.

All i had to do was hold the cable up for 3-5 seconds then let i go. It's a pity I have to do this every time. It only stated happening a few months ago for no apparent reason.

I had the same problem & have tried all these solutions, finally I found out what helped was to connect two apple devices (iphone 7 and X) at the same time to 2 different usb!!! It worked :)

I had this issue, reset privacy settings and voila! it worked again.

And then it stopped working and I've got to re-authorise everything again, which is a faff.

I'll lurk here until this gets answered because I effectively can't get videos off my phone without it, which is a real pain. I'm currently relying on Google Photos as a backup as the Photos.app just seems to now be redundant without being able to connect to the computer.

I contacted Apple Support, they told me to reset SMC, then NVRAM, but still i am facing the problem.

"Le Thuc Minh TienOct 25, 2014 11:57 PM Re: Devices rapidly disconnect/reconnect - Macbook Air Mid 2013
Re: Devices rapidly disconnect/reconnect - Macbook Air Mid 2013in response to staceyaytch

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!!"

This helped me and fixed the issue immediately!! Thanks so much for the helpful tip.

I had a similar problem where any of my devices (IP6, iPad Air 2) spastically charged from both USB ports and with any approved cable. I wanted to throw my devices out the window after hearing that **** charging sound go on and off, on and off, on and off. After a few minutes the devices would charge normally, however. Resetting the NVRAM solved this for me. I couldn't tell you why, but found it on another forum as a suggestion and it did the trick.

How to Reset NVRAM on your Mac - Apple Support

How to Reset NVRAM on your Mac

Learn about your computer's NVRAM, and when and how to reset it.

What is NVRAM?

A small amount of your computer’s memory, called “non-volatile random-access memory” or NVRAM, stores certain settings in a location that OS X can access quickly. The settings that are stored in NVRAM depend on the type of Mac you're using, and the types of devices connected to it.

Information stored in NVRAM can include:

• Speaker volume
• Screen resolution
• Startup disk selection
• Recent kernel panic information, if any

If you experience issues related to these features, you might need to reset the NVRAM on your computer. For example, if your Mac starts up from a startup disk other than the one you've specified in Startup Disk preferences, or if a question mark icon appears briefly when your Mac starts up.

Resetting NVRAM

1. Shut down your Mac.
2. Locate the following keys on the keyboard: Command (⌘), Option, P, and R.
3. Turn on your Mac.
4. Press and hold the Command-Option-P-R keys immediately after you hear the startup sound.
5. Hold these keys until the computer restarts and you hear the startup sound for a second time.
6. Release the keys.

After resetting NVRAM, you may need to reconfigure settings for speaker volume, screen resolution, startup disk selection, and time zone information.

If issues related to these features continue on a desktop Mac (like an iMac, Mac mini or Mac Pro), its logic board battery may need to be replaced. The logic board battery on desktop computers helps retain NVRAM settings when your Mac is unplugged. You can take your Mac to an Apple Store or Apple Authorized Service Provider to replace the battery on the logic board.

Learn more

On older Mac computers, similar information was stored in Parameter RAM (PRAM). Resetting NVRAM on Intel-based Macs using the same key combination is like resetting PRAM.

Power related settings can be controlled by the System Management Controller (SMC) on your Mac. If you are experiencing issues with powering on your computer, sleep, wake, charging your Mac notebook battery, or other power-related symptoms, you might need to reset the SMC instead.

Last Modified: Mar 17, 2016

The only way that worked with me was to plug the usb cord slowly before reaching the edge of my laptop, when the phone connects I stopped and it worked perfectly. Once I push the usb cord to the end the phone returns to the rapid disconnection.

Hope that helps!

I don't know what's going on, naturally.

Some Apple certified cables or not certified cables work, some of them not, with my certain iPhone SE and my certain MacBook Air, more often on right USB port than the left.

Tried every solution posted here, no effect.

What's strange is that all cables works great with wall sockets, with other iOS devices and even with the same USB on Mac when Windows 10 is launched on my Mac through Boot Camp (so it's not a hardware problems), so I consider this a software problem, 100%. Very strange glitch of macOS

I use the three-prong plug and the mac without the charger and it's the same. Sometimes the problem diss apearse for a while, but then it comes back. I have no issue connecting my phone to a Windows PC or charging it to the wall. I have no issue with the USB 3.0 ports of the Mac. The problem is the iPhone when I'm logged in in the Macbook.

Yesterday I reinstalled the IOS, I made a backup, etc. No solution. I called the Apple service and I follow every step they told me, but they don't know what to do.

If anybody has solved it, please let me know. Thank you.

3 apple leads used - 1 came with my 7+ im trying to use - on 11.2 beta

macbook air 2015 - plugged into mains, using battery - on high Sierra beta

reset all settings on phone

reset phone and mac

cleaned ports and leads

nothing works!!!

all other usb devices work though!!

all i want to do is back my pictures up on photos on my MacBook

I have tested this on two different MacBook Pro (mid 2015) one with Sierra and one with High Sierra. We have tested with four different cables and one iPhone 6s and one iPhone 7 Plus. One is on iOS 10.x and the other on 11.2. Still the same issue. No issues if you use the power cord.

This is such an annoying problem. This should just work - it is something that is one of the most basic operations in the Apple ecosystem. You sync your idevice to your Mac. I think Apple has really lost its groove. None of the solutions here are real solutions - no on pe has identified definitely what the problem actualply is. There is a real problem and Apple needs to fix it - not make their users try things at random and hope something might seem to work. if I wanted to waste my time like that I would use Windows.

I have MacBook Air 2017 with macOS High Sierra installed, having this issue with only my SE, 5s has no issue. I am on iOS 11.2.6 (latest in current time of writing). Mostly, iPhone SE connects and disconnects rapidly, and sometimes by mistake haha, the USB gives no issue, it happens with both the USB slots, and tried 2 Apple original cables and 1 from amazon basics. Still facing the problem. However, my iPhone SE connects smoothly to MacBook Pro (late 2012). Now i am confused, the question is, is there a problem with my Air or with my SE.

I took my mid-2015 MBP into Genius Bar under extended Apple Care for battery replacement, and they are also going to troubleshoot the USB iPhone / iPad issue. They said they are going to do an "EFI stress test" or something. I'll update upon repair completion.