MacOS Big Sur – unnotarized 3rd party quick look plugin

No, on Apple Macs being shipped with Big Sur, Python 2 and Python 3 are both still included.

$ which python
/usr/bin/python

$ python --version
Python 2.7.16

$ which python3
/usr/bin/python3

$ python3 --version
Python 3.8.2

This is on an M1 Mac mini running macOS Version 11.0.1.

After over an hour on the phone with Apple, it was suggested I try to use Migration Assistant to restore from backup. That worked for me.

EDIT: While it did work, there was a major issue: While trying to run Python/Jupyter in PyCharm, I repeatedly get malware warnings that have to be manually suppressed, individually. I mean, every file associated with a Python package in the virtual environment seems to be identified as possible malware. I called Apple about the issue, but no one knew how to globally suppress the malware warnings. There are way too many files to manually suppress them all.

I found an alternative, create a new project in PyCharm, copy in Python/Jupyer files (not packages, but files I created), then add the packages needed to run everything.