Hi @33thou, my installation is working with (without SIP enabled and Catalina) rviz and rqt to the point that I can make my own plugins to work. I noticed in the ROS Answers forum you posted that you are trying to source install but installed all of your python dependencies in a virtual environment. Have you tried installing the packages on the system and not the python venv? I believe downloading sip from homebrew will not automatically allow that installation to be used with the packages in the python virtual environment.