Keyboard does not work at all in El Capitan!
Mac Pro 2009
I did a clean install of El Capitan. So far so good. I have Snow Leopard on another Partition.
Because I have a tremor I went to the keyboard preference to change the delay until repeat. My keyboard then no longer worked.
My mouse, which is connected to the keyboard DOES still work.
There is no return to default option
Is this a good question?