As per the old post from Native Instruments (see here) Traktor Pro 2 seems to be working fine on my 2006 MacBook Pro.
I installed the New Mac Operating System, Lion today and have not seen any issues thus far. As with Lion the mouse track pad works in the opposite direction than before, so when you are scrolling through tracks it works like it would on an iPhone or iPad for scrolling. It is a little tricky to get used to, but it can be turned off in the preferences if you like. So far, I like it, so I’ll stick with it this way for now.
Another great feature is within Quicktime itself. I am now able to highlight the mouse clicks for my instructional videos. So for those people that requested that option in my videos, you don’t have to wait any longer. Thanks for your patience. Find my videos on Youtube at www.youtube.com/traktortips
If anyone hears of any issues upgrading let me know. It was seamless for me and everything was as it was before when running Snow Leopard.
Thanks to Native Instruments and Apple.
Edit: November 22 2011: For those experiencing some lagging, try this.