Ok I have started to experiment with the Arduino Uno and my Mac. So far I have gotten the Mac to communicate with the Arduino and do the light up of 3 LEDs one after the other using and Arduino sketch I found from watching this video on YouTube here:
Now the ultimate goal is to get the Arduino to communicate with Unity 3D on my Mac but in the code from the "Communicating from unity 3D to an Arduino" my serial port is on:
and in the code it is different. Now being new to Arduino I am not sure what needs to be changed in the code to make it all work??