Were you able to use this Samsung monitor in 4k @ 60hz and HiDIP? I have a mpb retina 15 early 2013 (GT 650M) and bought this samsung monitor (not yet arrived) but searching the Internet about this issue I'm almost canceling the purchase.I am using Macbook Pro 13" 2015
To get 4k @ 60hz with HiDIP Make sure you get a Mini Display port to Display port cable like this one:
https://www.amazon.com/gp/product/B00C7RJQPY/ref=oh_aui_detailpage_o03_s00?ie=UT F8&psc=1
The U28D590 is set to DisplayPort 1.1 by default. Make sure you set it to DisplayPort 1.2.
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