Hello,
I successfully build a version from the sources on my MacBook (10.12/XCode 8).
It's not exactly working well (some weird SDL/multithread error mesages+crash at Quit). No Popup Menu. I will take a look at that. May be trying to create a minimal native OSX menu.
Where are the event (right mouse while not captured) ti get the popup menu ? Right clic do not work, I want to change it to something else, spent some time to figure out where the event is captured, do not find it yet....
JV