B326hul won't work with Mac pro.. Help?

Earlepstein
Earlepstein Member Posts: 1 New User
edited March 2023 in 2017 Archives
I have a 2009 Mac pro running osx Mavericks with a GT120 512mb gfx card. The card is supposed to support up to 1600 by 2560. It displays the Mac boot screen when connected via mini display port to display port cable but as soon as the home screen appears, the monitor goes blank and a no signal message pops onscreen. I worked ONCE via dvid-hdmi, and with dvid-dvid it has shown the right screen image for a split second once or twice then back to no signal. I was so excited to finally get onto the bigger monitor and I know it works fine with windows. Help! Anyone?? Buller??