I'm running Python 3.8 and Mac Os Catalina 10.15.1 When I click a .py file, it will open the shell + editor, However if I try to open a new .py file from my finder window it won't open. The only way I can open another file is through the shell by clicking file - open. I downloaded a folder with containing .py files from the web and I have no issue opening those files from my finder window. It appear to be only files created in my computer.