It seems to work on the Mac too, but the original file is only 80K so the difference is smaller. I downloaded the empty avi-file, moved the original status45.MooV and then renamed the avi-file to status45.MooV. I tried a very simple picture, just Vicky with textures, and the rendering time went from about 60 seconds to 50. Poser 4 running in Classic under OSX 10.2.6.