I bought two th2g's as well hoping i'd be able to run 6 screens, i was not!
I have a quad core intel mac with a xt1900 video card, it runs 3 outputs fine on one th2g 3072 x 768 but when the 2nd th2g goes on there i cannot select a th2g see the th2g resolution for that output. I tried running the first th2g at a much lower res but didn't make a difference, does anyone have a graphics card they can suggest that would make this all work?

p.s.
They are analogue th2g's