I am unable to play a 4k blu-ray disc on my mid 2014 rMBP. It starts playing, but the video is very choppy. It is not view-able. The specs for my MBP are.. 2.8 GHz Intel Core i7 Processor. The memory is 16GB 1600 MHz DDR3. And the Graphics are NVIDIA GeForce GT 750M 2048MB Intel Iris Pro 1536 MB I can play small 4k clips (created by my iphone) perfectly fine, But the larger files (around 25 GBs), are just not viewable. Is it my MBP? Is it not fast enough? What could the problem be? BTW, I tried viewing the blu-ray with VLC and Leawo Blu ray Player Thank you very much for your help!