I love & playing PSP games with PPSSPP. My machine is a MacBook Pro Retina 2012 and using PlayStation 3 Wireless game controller.I bought an USB foot switch. It is recognized as a keyboard to my Mac.
www.amazon.com/Control-Keyboard-Action-Switch-Pedal/dp/B00B3PV47O/ref=sr_1_5?ie=UTF8&qid=1434625578&sr=8-5&keywords=USB+Foot+Switch
It was recognized Key-A, B and C on PPSSPP controller config.
But the foot switch was not available for game control.
I tried to connect and use plural keyboards to my Mac. I can play games with them. PPSSPP accepts plural keyboard input.
I don't know what's wrong. Why?