No sound output when wanting to hear scale

Hi, I’m brand new to scala and I’m watching tutorial on how to create my own scale but what I’m stuck with right now is that I can’t hear any sound when trying out the scales I’ve generated. I’m using the mouse click function just to rule out any midi compatibility issue and I still don’t hear anything. I’ve combed through the sound setting options but still don’t see how to fix that.
Would love some help. Thanks

MAC OSX 10.14.16
I’ve installed it following this gentleman’s (Scala Home Page) tutorial which takes to run XQuarts and SimpleSytnh along with Scala FYI, not sure if that matters.

Sorry, this is the Scala programming language:

Sorry about that! I knew something felt off here :sweat_smile: