It says "Scan for hardware changes" when you place the mouse cursor over it. This forces your computer to check all of it's hardware. Hopefully, it will detect the USB port that is unresponsive. Connect a device to the USB port. If it is working, nothing further needs to be done. If it is still not working, you can uninstall the USB controller in the device manager. You may need to scroll down quite a bit to get to "Universal Serial Bus controllers" Double-clicking it will expand and show all the USB devices and drivers.
Right-click a USB controller. It is listed below "Universal Serial Bus controllers".
Part 1. Fix USB Flash Drive Not Showing Up on Mac
The name of the device may be different, but the keyword to look for is "controller". Right-clicking it will display a popup menu. Click Uninstall device. This option is in the popup menu when you right-click a device in the Device Manager. This uninstalls the USB controller device. After uninstalling the USB controllers, restarting your computer will for Windows to scan for all hardware changes and reinstall the USB controllers you uninstalled.
After restarting your computer, check to see if the USB port is working by connecting a device to it. If the device is working, the USB port is fixed.
How to Connect USB Devices to MacBook Pro
It will need to be fixed by a professional. Method 3. Power off your Mac. To power off your Mac, click the Apple icon in the upper-right corner, and click "Shut down". Reset the SMC. Press the power button. This powers your Mac back on with the SMC reset. After resetting the system management controller, check to see if the USB port is working by connecting a device to it. Method 4. Press and hold these buttons as soon as your Mac starts to boot and hold them until you hear a sound and see the screen flash.
Then your Mac will boot up as usual. Include your email address to get a message when this question is answered. Already answered Not a question Bad question Other. Related wikiHows. Article Info This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness.
From there, you can browse the stuff in your USB, and use open [filename] to open things. Otherwise, you might want to copy everything off of the drive and reformat it. That fixes most problems. If the drive works fine on other OSes Windows, Linux, etc but not on your Mac or any others, then the drive may not be formatted properly.
If the drive previously worked on this Mac, but no longer does, and no longer works on other computer either, then it has either failed or its filesystem is corrupt.
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Home Questions Tags Users Unanswered. Is it formatted? What does Disk Utility show about the drive?
What does diskutil list show? Then, type: ls This will list everything there. Aidan Miles Aidan Miles 1 1 gold badge 3 3 silver badges 15 15 bronze badges.
If none of that helps, please post a screenshot from Disk Utility while the drive is plugged in. Medical School or Games Industry?