I bought one of those usb to dvi converters for a white polycarb macbook that only had one external monitor connector. While you couldn't run a game with it, i

I bought one of those usb to dvi converters for a white polycarb macbook that only had one external monitor connector. While you couldn't run a game with it, it worked great for work. They seem to have some embeded video card. (mine is no longer availble . But this looks similar: https://www.newertech.com/products/vidu3dvia.php https://www.newertech.com/products/vidu3dvia.php)