MacBook Air MacOS Mojava (10.14.6) crashes when python turtle module

I believe I responded to this question in 2020. I can confirm that the following Python script runs just fine in Python 3.9.1 on macOS 11.2.1 (M1), and on macOS 10.14.6. Copy and paste the following code into a proper programmer's editor (e.g. BBEdit) that will not destroy the Python indent:

#!/usr/bin/env python3

from turtle import Turtle, mainloop


def main():

    laura = Turtle()
    laura.color('red')
    laura.shape('turtle')


if __name__ == '__main__':
    main()
    mainloop()

You save this in a file named turt.py on your Desktop. Launch the Terminal application and enter the following:

cd ~/Desktop
chmod +x ./turt.py
./turt.py

Of course, you must have your PATH environment variable properly configured so that the python3 executable is found. If you installed it via the Python.org installer, it would have prefaced your Bash PATH with the path to the Python 3.9 executables in its library.