Traktor is now in the 2.6.x version range, try updating traktor to the latest version.
(2.0 came out long before Mavericks - I would not expect that to work anyway)
I have 2.6 installed and when I plugged in the s4 mk2 it worked straight away didn’t need to install any drivers so you should probably update traktor.
Only seem to have some sound problem to look at.
Just had it on my headphones to test and it’s not sounding good. Distorted even when I turn the volume down.
Will Hook it up later and see what it sounds like through my studio system.