Thanks for confirming that it works. It works on my setup but it's always nice when others confirm this kind of stuff.
I'll update the documentation.
* El Capitan is the last version of Mac OS which works in a VM (with the possible exception of early releases of Sierra). An up-to-date Sierra discovers that it is in a VM, and refuses to boot.
Really? I use VMware Fusion. I haven't run Sierra on it but looking around on the Internet reveals no blatant issues. Looks like High Sierra will work fine, although there were some hiccups in preview builds (which is to be expected).
* Xcode 8 (for Sierra) reportedly build apps that only work with Sierra, regardless of the settings in Xcode. This may not apply to Armory which is built from the command line.
I'm pretty sure this isn't true for CL apps. I want to say I ran a Sierra build in my El Capitan VM once and had no problems, although it was far from an extensive test.
I transferred the resulting App to my laptop running macOS Sierra - It looks like it is working, although I have not tested it extensively.
Everyone who downloads a Mac build from goatpig's site is running one built on El Capitan. Once support for Lion (10.7) is dropped, I'll stop building in my El Capitan VM and move on to Sierra or High Sierra.