I recently bought a late 2013 Macbook Pro. Its OS is El Capitan. I completed the migration, and now Traktor isnt working. I use two Pioneer cdj-1000mk2's and two technics 1200's. My mixer is a djm-900 nexus. I have never had any trouble with traktor and the use of my timecodes. Now nothing is working. I get a warning that reads "CALIBRATION FAILED _CHECK RECORDS AND NEEDLES". I open the Preferences Gear and in the timecode sections there is a snowy white ring, sometimes and sometimes nothing at all.

I have tried all the normal things. All my setting are the same as when before the migration.
is it is firmware issues with the mixer? do i need to install new drivers for something???

I am lost and I would greatly appreciate any help.