Is your iPhone not connecting to your Mac after you updated your computer to macOS Big Sur? Is this problem occurring when you plug your device in with the help of the Lightning to USB cable? Is the iPhone briefly showing up in Finder or iTunes before it disappears? Does this quick connecting and disconnecting behavior run in a loop and you can only stop it by disconnecting the cable?
Don’t worry! This issue has occurred in the past, after major macOS updates, or when users attempt to connect an iPhone for the first time to a new Mac computer. Fortunately, there is a permanent working fix that you can apply using a special command in the Terminal app!
How To Fix iPhone Not Connecting To macOS Big Sur
This problem occurs the first time you connect your iOS device to a Mac that has just been updated to macOS 11. As soon as it occurs, unplug the cable to stop the repeated connecting and disconnecting behavior. If you don’t do it, the iPhone will warm-up and this surly doesn’t help battery ageing. Next, proceed as follows:
- Open the Finder app. It’s available in the Dock.
- Use its Search function, top-right corner and type Terminal.
Tip: Make sure that the search is performed on This Mac and not using the Recents filter.
- Double-click on Terminal to open it.
- Copy/paste the following command in the Terminal window:
sudo killall -STOP -c usbd
Important: Make sure that the text is typed exactly as underlined above, maintaining the spaces.
Press the Return key to run the command!
Fact: That’s it, your iPhone should be now able to connect to your Mac without any problems. Go ahead and plug the Lightning cable back into the USB port. Is your iPhone now displayed in the Finder app, in the sidebar, under Locations? Click on its name and you’ll open up the interaction screen. Proceed with your initial plan of backing up your device, managing its storage or restoring from a backup!
Has this trick helped you out to fix the iPhone-Mac connection problem in macOS Big Sur? Use the comments section and share your feedback. Don’t hesitate to ask for additional help if needed. You can also find additional troubleshooting tips over here.
Related: Other common problems after updating to macOS Big Sur are:
– Mac admin password not working, not recognized by macOS 11.
– MacBook Pro Touch Bar not displaying properly or not showing up at all.
– MacBook Pro black screen of death while updating to macOS Big Sur.