Ahhh, gotcha.
So you have the Audio 6 selected in Traktor, and the audio 6 is connected?
And there is a Kontrol X1 tab on your preferences?
And did you try the restore button?
Nothing in Traktor will respond if there is no Audio Device selected, thats where I was going initially.
If the Audio 6 is being seen properly, and the Traktor on screen controls respond to your mouse, and yet the X1 still is not responding, press the restore button in the X1 tab.
If that fails, go to the controller manager TAB in the traktor preferences window inside traktor, and make sure it is listed in the device list, and make sure the in port is selected properly (should do it automatically, but if you had a different X1 hooked up to your setup - like a friends - it is still looking for that ID and you need to click the in port drop down box and select youres, witch should be the only one listed)
If it is not listed there, and it is plugged into your MAC and lit up, then this is what I recommend:
Uninstall your current X1 driver.
Go to the native instruments website, and go to the protected downloads area of the support page.
You should have to login with the same login you use for your service center.
Select the latest X1 driver you see in that list (your X1 might have come with an old driver, and for me at least - on PC - the new X1 driver didn’t show up in my service center) re-start the laptop after uninstalling the old driver (obviously) then install the latest driver from the support page.
Then go back into Traktor and see what you see…