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.
Information about products not manufactured by Apple, or independent websites not controlled or tested by Apple, is provided without recommendation or endorsement. Apple assumes no responsibility with regard to the selection, performance, or use of third-party websites or products. Apple makes no representations regarding third-party website accuracy or reliability. for additional information.
