Check and confirm if the USB ports are able to function normally.

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There are two ways you can fix all the problematic USB ports in a single go: listNum Reset System Management Controller (SMC) SMC is a chip inside your MacBook Pro that manages the components that require power to function.

Resetting SMC puts the configuration of all such components to their factory defaults, thus making the non-functioningunresponsive USB ports work properly.

Reset Non-Volatile Random Access Memory (NVRAM) or Parameter Random Access Memory (PRAM) NVRAM (or PRAM in old MacBook) stores the system settings such as date, time, screen resolution, etc.

This resolves many MacBook issues (including malfunctioning USB ports) within a few minutes.

Heres how: Reset SMC Resetting SMC requires your MacBook Pro to completely cut off from any power supply.

The older MacBook Pro computers had removable battery and therefore the process of resetting SMC in them was slightly different than it is in newer MacBook Pro.

To help all Mac users, resetting SMC on both types of MacBook Pro is explained below: Reset SMC on MacBook Pro without Removable Battery Shut down your MacBook Pro Click the Apple logo from the top-left corner, click Shut Down from the menu, and click Shut Down again in the box that appears next.

This step is not required if your MacBook Pro is already turned off.

Reset SMC Press and hold down the Control SHIFT Option (Alt) Power ( Eject ) keys together on your computers built-in keyboard for 10 seconds, and then release the keys.

This resets the System Management Controller ( SMC ) on your MacBook Pro.

Any issues with the components that require some power to operate are resolved in this step.

Boot MacBook Pro Connect your MacBook Pro back to the power supply after resetting SMC, and press the Power ( Eject ).

If you followed the process correctly, the USB device should be able to connect and function properly this time.

Press and hold down the Power button for 5 seconds, and release the button after that.

After resetting SMC, put the battery back in its socket, plug your MacBook Pro to the power supply, and press the Power button to boot your computer.

Reset NVRAM (PRAM) Unlike resetting SMC, the process to reset NVRAM (PRAM) is identical for both MacBook Pro with removable battery and without one.

Initiate restart Click the Apple logo, click Restart, and click Restart in the box that appears next.

This shuts down your MacBook Pro only to automatically power up again.

If your MacBook Pro isnt on, you can press the Power ( Eject ) button, and immediately follow the instructions in the second step.

This resets the NVRAM ( PRAM ) of your MacBook Pro, thus resolving any configuration and setting issues (including those with the USB ports) the computer may have.

Upon booting, you may need to reconfigure the system settings.

Reset Usb For Mac