So, these are my experience solving these problems: Tools like vcstool need to be located in usr/local/bin. So always use "sudo" when installing. (e.g. `sudo python3 -m pip install empy setuptools nose vcstool` ) Test every tool in Terminal first, make sure they are installed properly before going for ament build. --- [Visit Topic](https://discourse.ros.org/t/ros2-building-from-source-problem-macos/1789/4) or reply to this email to respond. If you do not want to receive messages from ros-users please use the unsubscribe link below. If you use the one above, you will stop all of ros-users from receiving updates. ______________________________________________________________________________ ros-users mailing list ros-users@lists.ros.org http://lists.ros.org/mailman/listinfo/ros-users Unsubscribe: