I have a 2006 Mac Pro Tower that only has DVI out for video monitoring. I just bought a iMac 27" and would like to use that as my monitor for my Mac Pro . I purchased a Gefen converter that is supposed to make my DVI compatible with Mini DV but it does NOT work. Has anyone had any luck and if so can you please post in detail what you did and where to get the products to make it happen. Thank you so much! Anyone?