Blaupunkt 4k LED TV as external monitor for MBP mid 2012 retina issue I initially connected the MBP 2012 retina 2.7 GHZ to the 4k display it showed me 3840x2160 correctly. But when I was optimising some display settings I changed to 1080p after that I no longer get the 3840x2160 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 3840x2160 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.
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.

3840 x 2160 at 30 Hz refresh rate

4096 x 2160 at 24 Hz refresh rate (mirroring is not supported at this resolution)- MBP 2013 and up.


Thus no 60Hz is possible.