OP-X PLAYER, the cheap ($39) preset version of OP-X, played in realtime with no latency on an intel mac within the new SM-Pro Audio VFX Application for mac (first public beta version). Note that the OP-X PLAYER is a windows vsti plugin!
The audio is routed via Cycling74 Soundflower to Apple Garage Band, where the audio stream is recorded and sent to the audio out, all without any noticeable latency!
The plugin could be installed without any problem using the integrated "Run VFX Plugin Insraller" provided in the VFX menu. The OP-X PLAYER is already adapted for VFX and V-Machine and needs no additional wizard file.
Note that you need an Intel Mac, PPC G4/G5 is not supported. Here's a short guide to try it out by yourself:
Sorry for the bad staggering, the video was shot just on the fly in less than ideal circumstances, just two hours after the first public beta release, with one hand holding the camera and the other one operating the mouse plus playing :-)