Hi, just downloaded the demo for ME, I could not get the fader to work properley using serato dj and a numark NS6. Tried midi mapping the fader and it jumps all over the place. system specs are: 15 in MBP, 16 GB ram, i7 quad core 2.3GHZ, integrated pro iris graphics, dedicated g force 750 video card with 2 GB ram, OSX 10.9.2. If we could fix problem I would definite purchase software. Thank you!