Is your MacBook USB-C port not working? Try this

⚡ Fast fix

• Cable or port? Try a different USB-C cable and charger, then switch ports.
• Blocked connection?Check the port for dust or lint and clear it with compressed air.
• Quick reset—Restart your Mac to clear temporary glitches.
• Accessory conflict? Unplug everything, then reconnect one device at a time.

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The all-important USB-C port is how your MacBook® charges, transfers data, and connects to accessories, like a printer or an external monitor. Most computers only have one or two of them, so if your MacBook USB-C port isn't working, you'll want to fix it ASAP. We'll walk you through how to do it.

Asurion Experts help millions of customers with tech issues like this every day—from speeding up a slow Mac® to fixing a broken Mac charger. Here's what to do when your USB-C port isn't working on your MacBook Pro® or MacBook Air®.

Inspect your USB-C port

The USB-C port may be small, but dust and debris can get trapped in there. Grab a bright flashlight or lamp, plus a magnifying glass, and peek into the port. Do you see anything? If you notice debris or dust, you can clean it out with a can of compressed air. If you notice that the inside of the port looks burned, you'll want to take it to MacBook expert to fix it.

Whatever you do, don't use safety pins, paper clips, or other sharp metal objects that can scratch your phone's delicate components or even chip and break off inside the port. For more, read charging port cleaning disasters—and how to avoid them.

Reset your Mac’s power system

Sometimes the issue isn’t the port—it’s how your Mac is managing power.

On older Intel-based MacBooks, resetting the SMC (System Management Controller) can help.

1. Shut down your Mac
2. Press and hold the Power button for about 10 seconds
3. Release, wait a few seconds, then turn it back on

If that doesn’t work, there’s a more advanced reset:

1. Hold Right Shift + Left Option + Left Control for 7 seconds
2. While holding those, press and hold the Power button
3. Keep holding all four for another 7 seconds, then release and restart

On newer Apple silicon Macs (M1, M2, M3), you don’t need to do this—just restarting or shutting down for about 30 seconds does the same thing.

Reset system memory (Intel Macs)

Your Mac stores certain hardware settings in memory, and sometimes those settings get stuck.

1. Shut down your Mac
2. Turn it on and immediately hold Option + Command + P + R
3. Keep holding for about 20 seconds

This resets how your Mac handles things like connected devices, including USB.

Check USB security settings

Newer versions of macOS include a security feature that can block accessories until you approve them.

1. Go to System Settings > Privacy & Security
2. Scroll to Allow accessories to connect
3. Set it to Ask for new accessories or Automatically when unlocked

If it’s set to always ask, your port might be working—but your Mac is waiting for permission.

Restart the USB system

Sometimes a background process just freezes—and your ports stop responding.

1. Press Command + Space, type Terminal, and open it
2. Type: sudo  killall  -9  usbd 
3. Press Enter and enter your password

This restarts the USB system and can bring ports back to life.

Check if your Mac sees the port at all

If nothing’s working, it’s time to check whether your Mac even detects the hardware.

1. Hold Option, then click the Apple menu.
2. Select System Information
3. Click USB or Thunderbolt/USB4 in the sidebar

If nothing shows up—even with devices plugged in—that usually points to a hardware issue, not a settings problem.

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FAQ

Why is my MacBook USB-C port not working?

It’s usually caused by a faulty cable, debris in the port, or a software issue.

How do I fix a USB-C port on a MacBook?

Try a different cable or device, clean the port, restart your Mac, and update macOS.

Can dust or debris stop a USB-C port from working?

Yes. Even small debris can block the connection and prevent devices from being recognized.

Does restarting fix USB-C issues?

Sometimes. Restarting can reset hardware connections and resolve temporary glitches.

What is an SMC reset and why does it help?

It resets power-related settings on your Mac, which can fix issues with ports and charging.

What if my USB-C port still doesn’t work?

It could be a hardware issue with the port or internal components that may need repair.