I've built multiple VMs with Vagrant (CentOS, ArchLinux, Debian), all exhibit the same problem:
When I ssh onto the VM,
0;vagrant@archlinux: ~vagrant@archlinux:~$ echo $DISPLAY 0;vagrant@archlinux: ~vagrant@archlinux:~$
I've tried troubleshooting as explained here: http://www.xquartz.org/Support.html, but that didn't help.
I'm running El Capitan 10.11.3, XQuartz 2.7.8.
All I'm trying to do is to run
vagrant ssh -c 'xclock' and have a window show up on my host OS.