I have a mid 2010 mac pro with ATI 5770 Graphic card with latest El Capitan. I also have a LG 2560x1040 resolution monitor that I would like to use with my mac. The monitor only has 2 HDMI inputs. How can I get full 2560x1040 resolution with my setup. -5770 specs shows that can support 2560 resolution. -I've used Mini Display Port to HDMI adapter and HDMI cable to monitor, but only displays 1920x1040. The adapter says supports 4K, and the have used the cable to get full resolution on an Ubuntu computer.(in this setup mDP to 5770 and HDMI to monitor) -When I use DVI to HDMI, OS X detects full 2560x1040 resolution but the screen shows the resolution in half, as if every other vertical line is missing and only about half the with of screen is show on the center of monitor.(in this setup DVI to 5770 and HDMI to monitor) What do I need to get 2560x1040 on my monitor that only has HDMI input?