4K video is still in its infancy, but Mac users are clamoring for high-resolution external displays. Many Macs have the ability to drive a 4K display, but it's not easy to get it to work with older hardware. Here's how I connected a 4K Dell P2715Q display to may 2012 Retina MacBook Pro, one of the first 4K-capable Macs. TL;DR: Yes, the Original rMBP Does 4K over … [Read more...] about How To Connect a 4K Monitor to a 2012 Retina MacBook Pro