How To Reset Usb Ports On Mac. Remove the battery from your MacBook Pro as well. Resetting the SMC on an iMac Mac mini or Mac Pro.
If a single USB port has failed but other USB ports are continuing to work on the Mac even after an SMC reset there may be an issue with that specific hardware USB port you can either avoid using that USB port and instead use a USB hub for one of the other functioning ports or you can have Apple run a hardware diagnostics test on the. Plug in the MagSafe or USB-C power adapter to a power source and to your computer. Release all the keys and the power button at the same time.
Overview of the USB Port Problems.
Wait 15 seconds and reconnect the power cord. Locate the Command Option P and R keys on the keyboard. Turn on the Mac while holding down the Command-Option-P-R keys until you hear the second start-up sound. You can do this by following these steps.
