4K build with Mac & Windows dual boot? Where to start?

Hi all, I'm not unfamiliar with building PCs - I used to do it until about 2009 but things seem to have radically changed.

I'm looking where to start with motherboard/processor/graphics card that will work with both Win10 and Sierra since I need to test software on both and running two computers is just not an option anymore in my small set up.

Thanks for any help!

submitted by /u/biggorillagames
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