If you see USB Devices Disabled on your Mac

Drives, cameras, keyboards, hubs, and other devices that plug into the ports on your Mac can request a limited amount of power.

If an external device isn’t recognized by your Mac and a message says that the device needs more power, the operation can't be completed, or USB Devices Disabled, try these steps:

• Disconnect and reconnect the external device to your Mac.

• Connect your external device to a different port on your Mac.

• If your external device is connected to a USB or Thunderbolt hub, connect your device directly to your Mac.

• If your USB or Thunderbolt hub is self-powered, make sure that it’s connected to an AC adapter.

If you still need help, contact Apple Support.