I have a dilemma I can't solve on what is the next best setup in apple hardware to buy? I'm a freelance Graphic Designer/Photographer What I have: Old 2009 Mac Pro NEC Multisync P242W Monitor Plenty of 3rd party software Photoshop 5 & 6 Complete Adobe CS 6 suite All running on Last version of El Capitan 10.11.6 Problem, my old Mac is too old to install Sierra or now HiSerria on it. Bought the NEC Monitor because I can calibrate it with it's software. I can't use a glossy screen as all apple monitors are. Too hard to do good color corrections. I don't like seeing all the reflections in a glossy monitor. A Mat type screen monitor is like looking at a piece of paper. perfect for Photographers doing color corrections and designers. If I buy a new Mac Pro (who knows when there coming out in 2018) with sierra on it it won't recognize a lot of my App's. If I try to solve the issue with a bootable external HD with El Capitan on it, and all my App's, Sierra won’t recognize it.