So I got it to work with Traktor 3.0 on OSX Sierra.
I followed setup directions here
Loaded the file instead of the one from the Youtube link
Tinkered with the audio output device for the controller and
Audio Output> DDJ-SB3 Audio Output
Output Routing > Internal
- Mapped Monitor (headphones) and Master
-enabled everything under external mixer mode to have full control of volume levels
In port - DDJ-SB3
out port- DDJ-SB3
I had to quit the software and unplug the controller a few times for it to 'sync' in. First all the controls worked but I had no audio but it's going now!