This is my first look at Gazebo.

I am using a Mac - and the installation went through fine.

I then started to do this tut: https://gazebosim.org/docs/harmonic/building_robot

The first command to try in the tut is:

gz sim ./building_robot.sdf

Which produces this error:

On macOS `gz sim` currently only works with either the -s argument
or the -g argument, you cannot run both server and gui in one terminal.
See https://github.com/gazebosim/gz-sim/issues/44 for more info.

So, I changed it to:

gz sim -g ./building_robot.sdf

However, this command does not open any window, and it does not terminate with an error.

This is related to Issue 44 and I probably need more than one command to run this SDF file.

Which commands must I run to get this first example to work?