If you encounter the “USB Accessories Disabled” error message, try the troubleshooting tips below to resolve the problem.
Disconnect & Reconnect USB Devices
• Disconnect all USB devices from the Mac, then plug them back in again and see if the problem goes away.
• If you aren’t sure which device is causing the problem, try disconnecting USB devices one at a time to see if the error message goes away.
• Prioritize whatever USB-C devices may be drawing the most power, for example trying to use an external GPU through a USB-C hub may often trigger the problem.
Troubleshooting USB Hubs
• If the USB hub is powered, be sure that it is connected to power directly.
• If you’re using a USB-C hub, try plugging it into a different port on the Mac
• Try disconnecting the most power-hungry device from the USB-C hub, and instead plugging that device directly into the computer instead using one of the built-in USB ports on the Mac.
• Try using a different USB-C hub.
Miscellaneous Troubleshooting Tips
• Connect the device directly to a different USB port on the Mac.
• Reboot the Mac with the devices connected.
• If you’re concurrently experiencing display issues with an M1 Mac, try connecting the display directly to the Mac USB port and use other devices through the USB hub (if applicable).
If you’re experiencing this error on an Intel Mac, sometimes resetting the SMC can resolve problems with USB as well. If you’re experiencing the USB Accessories Disabled error on an Apple Silicon Mac with an M-series chip, there is no SMC to reset so simply rebooting and using the troubleshooting steps above is typically enough to resolve the problem.
If you’re still experiencing power issues and USB accessories and devices not working on the Mac, it’s always possible there is a hardware issue that can only be resolved through official Apple Support, so if the above tricks failed reaching out directly to Apple Support is a reasonable next step.