USB game controller not detected Since upgrading my version of OSX, my computer no longer detects a USB game controller.  I know the controller is in working order because my Linux machine can talk to it.  I don't know which version broke it, but I have photo evidence of the controller working about a year ago and I'm currently running 10.11.3 (Mid 2014 MBP).  I can't divine anything useful out of /Applications/Utilities/System Information, maybe you can.

How do I debug the onset of incompatibility with my USB game controller?
I would suggest using the answer from this question to debug your USB devices. If it doesn't even show up there I'd assume the issue was on the controller's end. If it does show up there, it might tell you something about the controller that could help identify where the problem lies.