Mac users interested in Version 2.0 luxmark generally download:
LuxMark is a OpenCL benchmark tool. The idea for the program was conceived in 2009 by Jromang. It was intended as a promotional tool for LuxRender (to quote original Jromang's words: "LuxRender propaganda with OpenCL").
The idea was quite simple, wrap SLG inside an easy to use graphical user interface and use it as a benchmark for OpenCL.