Since the upgrade to Sierra on my Mac, when I try to run ssh -X kvm-server virt-manager I get the following error: root@kvm-server:~$ Failed to connect to Mir: Failed to connect to server socket: No such file or directory Unable to init server: Could not connect: Connection refused Failed to connect to Mir: Failed to connect to server socket: No such file or directory Unable to init server: Could not connect: Connection refused (virt-manager:4772): Gtk-CRITICAL **: gtk_settings_get_for_screen: assertion 'GDK_IS_SCREEN (screen)' failed If I connect from another host such as Linux, the connection works as designed. If I connect from El Capitan or Yosemite, it works.
ssh forwarding works fine for me on Sierra. If it didn't, the issue would be with ssh, not with XQuartz.
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