Reply to CDJ configuration to Traktor (Macbook)

Hey guys, I am new to this site but am looking for a little help trying to set my CDJ 400's + DJM 400 with a brand new 2013 Macbook pro. Everything is physically connected (RCA cables, USB cables to CDJ's). I'm trying to combine the CDJ sound cards into one via aggregate, but all the videos/tutorials I've seen are for an older version of the macbook, (new to macbook to). Downloaded Traktor and I go to the 'setup wizard' but says I am missing TSI files and won't open. Can anyone send me screen shots of their set up of the 'preferences' section on Traktor and the audio midi setup combines the sound cards. this is doing my head in, thanks.