Audacity 2.0.4 + TTUSB sound issues

I was recently gifted a TTUSB and plugged it into my MacBook Pro Retina Display to use via usb. After reading two Google pages worth of support forums I am still unable to have sound playing through my computer. All of my computer and Audacity settings have been changed (to my knowledge) and while I am able to record I am still unable to hear the music being played. What am I missing?!

In your Googling did you find this et of tutorials dis you find this set of tutorials:

especially this one:

This is our best take on how to make these things work - I did a lot of work on the latter tutorial after I acquired an ION iTTUSB (The ION manual was rubbish - just plain incorrect in parts).