OS X 10.10.3 brings enhanced 4K support (including 12-inch MacBook), adds 5K Dell for Mac Pro/iMac - 9to5Mac
![The MacBook Pro (Retina, 13-inch, Early 2015) and Dell UltraSharp 27 Ultra HD 5K Monitor UP2715K and Apple Watch Reviews! | David Boles, Blogs The MacBook Pro (Retina, 13-inch, Early 2015) and Dell UltraSharp 27 Ultra HD 5K Monitor UP2715K and Apple Watch Reviews! | David Boles, Blogs](https://i0.wp.com/boles.com/called/15/a-15-8.jpg?resize=498%2C317)
The MacBook Pro (Retina, 13-inch, Early 2015) and Dell UltraSharp 27 Ultra HD 5K Monitor UP2715K and Apple Watch Reviews! | David Boles, Blogs
![I tried using the high end monitor "UP 2715 K" which can display 4 K video with plenty as it is 5 K size - GIGAZINE I tried using the high end monitor "UP 2715 K" which can display 4 K video with plenty as it is 5 K size - GIGAZINE](http://i.gzn.jp/img/2015/01/08/dell-up2715k/00-top.jpg)