Hi i have a 42 inch samsung tv and a mac pro 1.1 that has 2.1 and El capitain with a geforce gts 250 1gb. I can get it to work on a 22inch tv thru dvi to vga. But was hoping to get it to work on my tv i have tried hdmi dvi and vga. The tv detects that there is something connected to it but will not display anything. After the mac boots. I have the geforce driver from tonymacs site which installed and worked no problem on my 22 inch. But nothing on my samsung. Anyone any ideas why the samsung is not displaying any video signal