Hey guys, I'm a long-time mac user but new to here. I'm planning to upgrade my home office to a Mac Pro with three 4K monitors. After some research on the web, it seems that not all such monitors (27'' 4K) are recognized by OS X as retina displays, in which case the display setting will show a list of resolutions for you to choose instead of "text size" options. I'm looking at Dell U2718Q, can anyone confirm how it work with Mac Pro? Thanks in advance.