I’ve been experimenting and learning Unity over the last couple of days. One thing that I wanted to be able to do is use an Xbox 360 controller with my mac. For the life of me I couldn’t get the “A” button to work. Well the reason is I’m using the TATTIE BOGLE DRIVER for os x and the button reference that I was using from online videos was not correct if you are using this driver. So I went to the Unity wiki and found the following. 

If you follow this tutorial just use the number 16 for the A button rather than 0.