About Caffeinated Program Runs

MacOS has a utility program caffeinate which can prevent the computer from sleeping at a wrong time.

You can run it like this in the Terminal while watching a long video:

$ caffeinate

Or you can run Django management commands with it like this to prevent sleeping while you access the local website on a smart phone:

(.venv)$ caffeinate -dimsu python manage.py runserver \
0.0.0.0:8000 --noreload

The caffeinate parameters are as follows:

• -d - keep screen awake.
• -i - prevent idle sleep.
• -m - prevent disk sleep.
• -s - prevent system sleep (on power).
• -u - simulate activity.

That's basically: "don't sleep under any condition while running".