pygame module not found on Idle after installing on Mac

[metulburr]

The Python version you install pygame to and the python version you are running to test it are two different python versions with independent 3rd party libraries (one of which has pygame installed and the other does not)

Python 3.8.2 (v3.8.2:7b3ab5921f, Feb 24 2020, 17:52:18)

Requirement already satisfied: pygame in ./Library/Python/3.7/lib/python/site-packages (2.0.0.dev6)

Based on this you installed it to a different python version. This is Python3.7, not Python3.8.2

But when I try to import pygame on Idle

You can make any IDE use any python version. Just point it to the one you installed pygame to. or invoke the python interpreter that your IDLE is running to install pygame