Hi! I am not sure if I posted this in the right category, but I will ask anyways. Last fall (2013) I bought the new MBP Retina 13" with Intel Iris, and it is still the newest macbook pro retina version. Yesterday I bought the Philips 4k 28" monitor, which I am going to use on my office. But when I connect them together, the cursor hangs, and lags, and the general responsive time on both keyboard and cursor about .5 seconds. I am using the HDMI output on the retina, and the HDMI input on the screen. I think it is weird if my Macbook doesnt support it properly, since it is the newest model, with 16GB RAM and 2,6 GHz. Is there anything I am doing wrong, or should I use another connection than HDMI?