Yes, the link/comment from willvincent is really strange, because when you check the complete thread you can see that BoogieBear has fixed his problems and stated:
"The issues I have been struggling with are all down to the USB drivers for the various devices and the fact that in native form they all appear to be named 'USB Audio Device'"
And to be more on-topic: Geoff Waddington has wrote a Mackie Control extension that exist also for Mac OS:
http://forum.cockos.com/showthread.php?t=87265