there is a control panel- that you have to download to set it up-
and yes -then it may or may not work.
http://www.matrox.com/graphics/en/gx...gital/home.php
the thtg-d doesnt have an external psu - its usb powered - so that might make a difference in grounding things too.Systems operating under Mac OS® X must download the GXM Control Panel to access all DualHead and TripleHead resolutions