Mac pro 4.1 with HD 5870 1 gb Graphic card three display with star tech DP HUB doesn't work!

Francesco Gatti

Reputable
Apr 28, 2015
1
0
4,510
My set up is a Mac pro with ML 10.8.5 with 48 gb ram, Ati Hd5870 1 gb graphic card. I recently bought a display port hub (star tech) to have 3 monitors set up. I cannont extend the desktop on the 3, i have only the mirrored screens and cannot find any solution….ideas? Help?