I've been trying to find an answer to rather peculiar question but with no luck. If it was discussed somewhere already, please don't throw feces and stones...a link would be enough I have a unibody MBP 15" from 2012 with maxed specs (CPU, RAM and matte hi-res LCD). Having Geekbench score of around 12200 I don't have any problem with the system when it comes to process loads of photos or handle editing in Capture 1 and Photoshop. The only thing that bothers me is the missing retina screen. I always have secondary display, but it's showing its age and I've been thinking to replace it. The options I'm looking at is either 'regular' 30" or 4K 30" and I would like to ask experts here if there is a chance to use 4K monitor with my system (max resolution would be only 2560 by 1600 pixels), at 1920 by 1200 but in a HiDPI mode and so 'simulating' Retina? Thanks!