It looks like default mappings are not properly set up for macOS.
You'll have to reconfigure A and B to whatever you desire.
In the mapping dialog:
Click the button next to "A". (The one that says "Click 0" )
The button will change to show "...".
Within the next 2 seconds press your desired keyboard key or mouse button.
Do the same for "B".
You'll have to reconfigure A and B to whatever you desire.
In the mapping dialog:
Click the button next to "A". (The one that says "Click 0" )
The button will change to show "...".
Within the next 2 seconds press your desired keyboard key or mouse button.
Do the same for "B".