I am trying to install gazebo_ros_pkgs for ROS2 on MacOS Catalina. I have managed to install Gazebo 11.3.0 and ROS2 Foxy Fitzroy but I am having trouble installing gazebo_ros_pkgs. The tutorial only gives instructions for Ubuntu and I am not sure how to adapt this to my system.

Any advice?

Edit: More detail as requested below. On the rosdep install --from-paths src --ignore-src -r -y step I get the following output (all steps before work as expected):

ERROR: the following packages/stacks could not have their rosdep keys resolved to system dependencies: gazebo_dev: No definition of [libgazebo11-dev] for OS [osx] cv_bridge: No definition of [python3-opencv] for OS [osx] Continuing to install resolvable dependencies... #All required rosdeps installed successfully

The colcon build --symlink-install then returns:

Starting >>> cameracalibrationparsers
Starting >>> cvbridge
Starting >>> gazebodev
Starting >>> gazebomsgs
Starting >>> imagetransport
Starting >>> imagegeometry
--- stderr: cvbridge
CMake Error at /usr/local/lib/cmake/Boost-1.74.0/BoostConfig.cmake:141 (findpackage):
Could not find a package configuration file provided by "boostpython"
(requested version 1.74.0) with any of the following names:

boost_pythonConfig.cmake  
boost_python-config.cmake

Add the installation prefix of "boostpython" to CMAKEPREFIXPATH or set
"boostpythonDIR" to a directory containing one of the above files. If
"boostpython" provides a separate development package or SDK, be sure it
has been installed.
Call Stack (most recent call first):
/usr/local/lib/cmake/Boost-1.74.0/BoostConfig.cmake:258 (boostfindcomponent)
/usr/local/Cellar/cmake/3.19.1/share/cmake/Modules/FindBoost.cmake:460 (findpackage)
CMakeLists.txt:22 (findpackage)

---
Failed <<< cvbridge [3.26s, exited with code 1]
Aborted <<< gazebodev [3.30s]
Aborted <<< imagegeometry [5.76s]
Aborted <<< imagetransport [6.38s]
Aborted <<< cameracalibrationparsers [6.53s]
Aborted <<< gazebo_msgs [8.32s]

Summary: 0 packages finished [8.88s]
1 package failed: cvbridge
5 packages aborted: cameracalibrationparsers gazebodev gazebomsgs imagegeometry imagetransport
4 packages had stderr output: cameracalibrationparsers cvbridge imagegeometry imagetransport
7 packages not processed