Very nice, looks like compatibility is really good so far. Good write up. Helps to know a SSD is needed.
It's definitely possible to get the m.2 SSD working on a Hackintosh. Head over to tonyxmac86 and there are a few long threads. But it looked like a huge PITA compared to SATA or PCIe SSDs and I wanted to keep my operating systems on separate hard drives anyway... so I didn't bother.
I've overclocked up to 3.8 GHz/1.4V on both operating systems and it's quite stable. I'm sure it can go higher but I don't feel the need to stress the system, especially since it's a small case. Here's the geekbench result:
http://browser.geekbench.com/v4/cpu/3648769
Not bad for $1,300. The current top-of-line Mac Pro has a multi core score of 25,061 which I could easily surpass if I OCed to 4.0 GHz... and the trash can costs $5,199. It's too bad, I have loved my MacBookPros and the iMac I used from about 2011-2015... but the products are way too overpriced these days. It will be interesting to see if the next rendition of the Mac Pro is modular/customizable or another ripoff.