I just bought a second hand Traktor Kontrol X1 mk1 and it is not being recognised by Traktor. I am using a newer version of MacOS (Sequioa 15.7.2) and I saw the latest driver for Kontrol X1 mk1 only goes up to MacOS 10.11.
I will have to try resell Traktor Kontrol X1 mk1 and am considering buying a Traktor Kontrol X1 mk2, but want to make sure I do not run into the same issue now or down the road.