Reply to CDJ850 soundcards and macbook

Hey guys, I just purchased a new macbook pro the other day and now I am trying to hook my cdj850's with traktor pro 2. I am familiar with asio4all on my pc but now with the mac I have no idea how to configure the audio settings in traktor to work with both external soundcards. I dont know a lot about this stuff so if someone can help me out thaty would be HUGE. Now that ive spent all this money i would like for it all to work smooth

Thanks a lot!!!