Type 'help', 'copyright', 'credits' or 'license' for more information. To use the new Python version, you need to run python3 in the terminal.Now when you execute the python command in a terminal, you will find it still uses the old version which is 2.7.
How To Fix Installed Python3 But Still Python 2.7 Is Used Error. Open a Finder, click Go -> Go to Folder… menu item at the top menu bar.