wireless keyboard generating spurious characters
My wireless keyboard is generating spurious characters continuously
Mac mini, OS X El Capitan (10.11.1), late 2014
My wireless keyboard is generating spurious characters continuously
Mac mini, OS X El Capitan (10.11.1), late 2014
Try another keyboard. If that works correctly, your original one is probably damaged and needs repair.
Reset the PRAM. If that does not help, it is probably failing (as Tom indicated).
Barry
wireless keyboard generating spurious characters