iPhone Keeps Connecting and Disconnecting from MacBook, Mac Finder after Update macOS Big Sur/Catalina

Last Updated on Aug 23, 2020

All of sudden, why iPhone keeps connecting and disconnecting while plugging to Mac? There are many reasons why the iPhone cannot establish a stable connection with Mac and keeps disconnecting. Might be possible that the lightning cable that you are using is Apple non-certified cable or defected. Also, if you are dealing with this problem, most of the time while we backup iOS devices on Mac or Restore the old backup to the iOS device. it might be difficult to charge the iPhone with the help of Mac. Some users Don’t know it’s shown on Mac, They are asking why my iPhone playing Charging Sound continuously with Haptic vibrate. That causing your Mac or Windows System hanging because your Mac/PC auto syncing the device automatically if it’s enabled on Device Summary on Finder or iTunes. Some Mac Users asking why My iPhone/iPad not showing on Finder Sidebar, To solve the issues checkout video tutorial in the last of this article.

we are happy to help you, submit this Form, if your solution is not covered in this article.

We have collected eight most related solutions that will help you fix iPhone keeps connecting and disconnecting from Mac. So take your time and try these below troubleshooting tricks.

Fix iPhone Keeps Disconnecting and Connecting from MacBook, Mac: iOS/iPadOS

Most Recommended Solution: Reset Location & Privacy

We’ve received a positive response by Resetting Location & Privacy than any other trick. Try this first and if it doesn’t work, move down to other solutions.

Before resetting location and privacy on your iPhone, disconnect the iPhone from Mac. This action will restore all the location and privacy settings to default. Once you do this, each app will ask you for location permission to use location services on a particular app.

Step #1: Open the “Settings” app on your iPhone.
Step #2: Select “General”.
Step #3: Tap “Reset”.
Step #4: Lastly, tap “Reset Location & Privacy”.

Solution 1: Check the Lightning Cable or Try Another Cable/ Loose Connection Fix

The first thing that should be checked is the lightning cable that you are using to connect iPhone to Mac. If the charging cable itself is damaged then, iPhone keeps connecting and disconnecting from Mac. Borrow charging cable from your friend and verify, is your lightning cable is damaged or iPhone is facing other problems while connecting to Mac.

  • Plugged out or Plugged in USB port from Mac
  • The 8-pin lightning port on iOS device full up with small particles or debris that make the connection lost between Mac and iPhone/iPad. Use Wooden teeth stick and clean up using Dry tools and hand.

Solution 2: Restart iPhone and Mac

Since the lightning cable is perfectly working, the next step is to eliminate minor bugs from iPhone as well from Mac, who might be causing this problem. A quick force restart will help you fix iPhone keeps disconnecting and connecting from Mac. Depending upon your iPhone model, follow the steps.

For iPhone 8 or later,

  • Press and quickly release the Volume Up button.
  • Press and quickly release the Volume Down button.
  • Press and hold the Side button, until you see the Apple logo on the screen. Wait for 15 seconds and use the side button after that to turn on the iPhone again.

For iPhone 7 and 7 Plus,

  • Press and hold the Volume down button and Power button until the Apple logo appears on the screen.

For iPhone 6S Plus or earlier,

  • Press and hold the Home button and Power button and release when the Apple logo appears on the screen.

To restart Mac

  • Click on the Apple menu and then select Restart.

Solution 3: Kill Process using Activity Monitor

The Activity Monitor is very useful when some application doesn’t work as per expectation. Just like we force close the applications on iPhone, Mac has Activity Monitor that force closes the app and processes. One of the users with the same iPhone keeps connecting and disconnecting issues, had fixed the problem with this solution.

Step #1: Connect iPhone to Mac.
Step #2: Go to the “Applications” and select “Utilities”.
Step #3: Open the “Activity Monitor”.
Step #4: Type in usbd in the search box and force close all the processes by clicking on (X) symbol.

Force Close USB port process from Activity Monitor on Mac

Force Close USB port process from Activity Monitor on Mac

It can also be done from Terminal,

Step #1: Launch “Terminal” from the spotlight.
Step #2: Type the command, sudo killall –STOP –c usbd and hit enter.

Solution 4: Reset NVRAM and PRAM

If any hardware of Mac is raising the connectivity issues with iPhone, then resetting NVRAM & PRAM can help you fix the issue. To determine, the real problem, go with the below steps on your Mac.

Step #1: Remove your iPhone from Mac.
Step #2: Shut down Mac.
Step #3: Now turn on Mac, and hold down the Option+Command+P+R keys for about 20 seconds. Release when you hear startup chime on Mac.
Step #4: Wait for a minute, Mac will restart.

Still, if you are unable to fix the iPhone keeps connecting and disconnecting issue, then make an appointment at Apple Genius Bar and get it fixed.

Solution 5: Reinstall MacOS that Repair Corrupted System

Take action on MacOS software, Repair the MacOS without erasing data that saved on Macintosh HD drive. To do that follow the below steps and backup all important data to Time Machine for the security purpose. Reinstall MacOS will take time because it depends on internet connection speed, During the Reinstall MacOS request your Mac first download the latest compatible MacOS to Mac and install on Mac after that.

  1. Go to Apple Logo on Mac and Click on the Restart option.
  2. Now, your Mac shut off and turn on again, Quickly Press and Hold Command + R key until you see MacOS Utilities windows on Mac screen.
  3. The second option is “Reinstall MacOS“. – Reinstall a new copy of MacOS.
  4. follow the on-screen instruction.
MacOS Utility for reinstall MacOS

MacOS Utility for reinstall MacOS

Solution 6: Create a New Admin Account and Try Again

Your Mac will create a new directory for the New Admin Account that we create from the primary Administrator account. also, all the settings that don’t overwrite from your main account. That’s why I recommend using different Apple IDs for testing purposes, after that we can change to our primary Apple ID under the System Preferences > Profile.

  1. Go to Apple Logo on Mac and click on System Preference.
  2. Next Click on Users & Group option.
  3. Unlock the Lock, Tap on Lock at the bottom left corner of the windows. and Enter Mac Password to authorize it.
  4. After that Click on + icon to add new User. also Select Admin type “Administrator”, Username and New Password for New Admin account.
  5. That’s it.
Create a new Admin account on Mac

Create a new Admin account on Mac

Now Switch to New Account, Go to Apple logo on Mac > Lock Screen. Click on the New Admin account and use it for Backup and Restore the device using Finder, like the primary admin account.

Solution 7: Update iPhone and Mac

As Apple always says that to use the iPhone and Mac seamlessly, both the devices should be running on the latest version. Otherwise, you may encounter multiple software issues like this one. Before updating the iPhone, make sure the iPhone has 50% or more battery and connected to a stable Wi-Fi connection. And for Mac, try to use Ethernet cable to speed up an update procedure.

On your iPhone,

Step #1: Go to the “Settings” app.
Step #2: Tap “General”.
Step #3: Select “Software Update”.

On your Mac,

macOS Mojave or later

Step #1: Click on the Apple menu > System Preferences.
Step #2: Select “Software Update”.
Step #3: Lastly, click on “Update Now”.

For earlier macOS versions,

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We are happy to help you! Follow the next Step if Your Solution is not in this article, Submit this form without Sign Up, We will revert back to you via Personal Mail. In Form, Please Use the Description field to Mention our reference Webpage URL which you visited and Describe your problem in detail if possible. We covered your iPhone 11 Pro, iPhone 11 Pro Max, iPhone 11, iPhone 8(Plus), iPhone 7(Plus), iPhone 6S(Plus), iPhone 6(Plus), iPhone SE, SE 2(2020), iPhone 5S, iPhone 5, iPad All Generation, iPad Pro All Models, MacOS Catalina or Earlier MacOS for iMac, Mac Mini, MacBook Pro, WatchOS 6 & Earlier on Apple Watch 5/4/3/2/1, Apple TV. You can also mention iOS/iPadOS/MacOS. To be Continued...

Step #1: Navigate to the “App Store”.
Step #2: Click on “Update” tab and then on “Update All”.

Solution 8: iPhone/iPad Not Showing on Finder Sidebar under the Locations

Launch Finder on Mac and Go to Preference from top menu.
Third Tab is Sidebar. click on it.
Enable Check mark on Cds, DVDs and iOS devices. Check out video guide on how to fix.

Above all are the most helpful solutions that somewhere I used in past on my Mac. Because iPhone automatically disconnecting and reconnecting with Mac also iPhone/iPad play plugged-in sound.


Jaysukh Patel is the founder of howtoisolve. Also self Professional Developer, Techno lover mainly for iPhone, iPad, iPod Touch and iOS, Jaysukh is one of responsible person in his family. Contact On: [email protected] [OR] [email protected]

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