imac keyboard and mouse not working

Try unplugging everything from your iMac for 5 minutes. Then just plug in the power cable and the mouse and keyboard. Press the power button and then immediately hold down the option, command, P and R keys until you hear the second chime and then release the keys.

Hopefully your iMac will start up and the mouse and keyboard will function.

thavarajah said:

Hi

I have iMac from 2011, and suddenly the keyboard and mouse is not working. It seems be all my USB port is not working. Are there anything i can do?

Thanks,

Click to expand...

If you've fried your onboard USB, then a possible workaround is to get a Thunderbolt Dock (from OWC or Caldigit seem to be the most popular) and use the USB3 ports on the Dock to connect your keyboard and mouse...