I'm following the tutorial http://gazebosim.org/tutorials?tut=actor&cat=build_robot and the title indicate that gazebo 9 is also supported. When I tried to run "gazebo actor.world", the GUI showed up for a few seconds and then crash.
I'm using macOS Mojave and the gazebo version is 9.7.0_1 (installed via brew). Does anybody know how to tackle this issue? Thank you.