Same here vgem! Macbok Air 1.7 i7, 8Gg OSX 10.9.5. I think it's not osx related vanakaru. Also you are pointing to a totally different problem, with a different software. Because in my case, all other applications that uses insight cam work well: Mad Mapper, Arkaos, Grand VJ, Booth iMovie etc. Modul8 doesn't respond to the klick on the Prefernces/Videocapture (source and settings)-Button. While "Video capture is waiting..." message appears in the orange bar beneath the Layer box that was assigned to video input. tried input 1,2,3,4 . Reinstalled modul8 2.8 twice too. Everything else in modul8 works fine and as mentioned - MadMapper also gets insight signal.... so what could it be?