external mac keyboard not working with maverick on macbook air
I installed Mavericks 10.9 on a mid-2013 macbook air. The Apple external keyboard is no longer working from either usb port (external usb mouse does work, however, as does external firewire display). Reset PRAM and SMC to no effect. External keyboard and external monitor (firewire) were connected at time of installing 10.9 (no idea if this interferred with the setup). Any suggestions on how to resolve appreciated.
MacBook Air, OS X Mavericks (10.9)
