Nice straight forward tutorial. I landed here when searching for “xhyve shared folder”. I started using xhyve too a couple of months ago due to little RAM that I have on my macbook air. Look like there’s no option for now other than network based solution — nfs/samba to share files between host and guest on xhyve.
Btw, I’m using xhyve with Alpine Linux — http://devkini.xyz/php-on-alpine/