I initially connected the MBP 2012 retina 2.7 GHZ to the 4k display it showed me 3840×2160 correctly. But when I was optimising some display settings I changed to 1080p after that I no longer get the 3840×2160 option at all.Yet I could still load into my Windows with the 4k at 30 hz. It would be great to know how can get the 3840×2160 resolution option back.
It would be interesting if anyone could tell me if they have successfully shot upon 4K with 60 hz on mid MCP retina. If so would be great to know how you accomplished it.
Just a normal mini-displayport<->displayport cable was used.
Best Answer
Your system supports following resolutions:
You can use 4K displays and Ultra HD TVs at the following resolutions and refresh rates via the built-in HDMI port.
Thus no 60Hz is possible.