This is my setup:
Seiki SE50UY04 50" with Firmware 522712
Mac Mini running MacOS X 10.9 Mavericks
Intel HD Graphics 4000 1024 MB graphics
Active Startech HDMI to Mini DisplayPort Adapter MDP2HDSW
"High Speed" HDMI cable
I can not get 4K resolution to work and can't figure it out as it seems like other people are succeeding with all these pieces. In any 4K mode, it just wraps the display on the left half of my screen. Lower resolutions work fine. I've seen what I think is perfect 4K when I boot the Mac. The startup screen with just the Apple on a grey background looks glorious. Then when it switches to the login screen I'm stuck back at half screen. I've tried every variant I can think of in SwitchResX for settings to no avail. Is the Intel chipset the problem? Photo of the screwy half screen problem attached as well as example SwitchResX settings that cause it. You can't tell from the image, but it basically wraps the display over the left half of the screen twice. I can hyperspace the mouse off the right edge and back onto the left and back.