Resolume Forum

Simple question and solution except that I own a Matrox DVI Triplehead and it has never worked properly. Is there any other way?
My Mac only has one Thunderbolt.

Matrox Tripleheads don't work with OS X. Have you tried Bootcamp just to satisfy yourself and see it working?

I use a triple head with osx,it works fine.
I can drive it 2x1024x768 from hdmi with a passive adapter,
get a thunderbolt to dual link dvi adapter, and you can get the 3 outputs.