I currently have a Samsung UHD TV (Series 6 50 inch JU6400 4K UHD LED TV) and I tried plugging an HDMI cable (using an HDMI to mini Displayport adapter) and I couldn't get the TV to receive any video from the Mac Pro. cMP has a Quad-core 3.4 GHz Intel Xeon, 5870 radeon, 24 gb of RAM. Running Mavericks. Tried doing this with my late 2013 MBP and it worked flawlessly. Is there anything I can do to remedy this? (using some sort of program, application, drivers, etc.) I was looking forward to using my cMP as a media station and purchase a new Windows machine as my main workstation. Thanks for your help.