I'm using one I bought November 2018 - 3GHz 6 core, 8GB memory, 256 GB SSD.
Very happy with it; I do most of my day to day work on it, as I've long been a Mac user. (If you're a dev on a Mac, I highly recommend Nova from Panic.com; I love it.)
It runs the Mac Builder just fine; I've not tried booting Windows on it - for the B4X stuff, I have a Surface Laptop 3. The two share a Philips HD monitor via a small HDMI switch.
Also recommended, if you're using more that one system, one of the Logitech mice that supports multiple systems. I use the MX Ergo trackball, and a click of one button switches it between Mac and PC; they have keyboards that do similar.