How To Clean Usb Port On Mac. If the USB ports not working on your MacBook Pro or iMac is a recent issue and there doesnt seem to be any problem with USB devices it could be that an app is conflicting with USB functionality. In such case to clean USB flash driveSD card is one possible solution.

Apple Silicon Mac. These Mac models have Thunderbolt 4 USB-C ports. Q-Tips or dry cotton wool should clean your ports well.
Id prefer to use a new one In the event that a bristle somehow breaks off dont panic.
In such case to clean USB flash driveSD card is one possible solution. In Disk Utility select Macintosh HD or whatever the name of the drive to erase and clean. Chocolate somehow got into my bag. I have two USB serial adapters that Im using for a project Im working on.

