Whenever I use ssh, after I type the password, xQuartz pop ups in the dock and terminal window looses focus. This happens even if there's no an X session. Why? How to prevent this behavior?
Solved by myself. XQuartz installation added a custom configuration for ssh in
/etc/ssh_config for older macOS versions). I have just removed
ForwardX11 yes and ssh won't open XQuartz anymore.
Below shows the file contents that's causing XQuartz to open.
$ tail -5 /etc/ssh/ssh_config SendEnv LANG LC_* # XAuthLocation added by XQuartz (https://www.xquartz.org) Host * XAuthLocation /opt/X11/bin/xauth