1. Go to the chromium official site.
2. Move to the Downloads page.
3. Follow the instructions for Dev or Canary channel.
4. Select an appropriate architecture, for example, Mac OS X (64-bit).
5. Find the file “LAST_CHANGE” with the Filter field on upper left of the page and download it.
6. Find the folder named a number written in the “LAST_CHANGE” file.
7. Download a driver file as “chromedriver_mac64.zip”.

>>> import sys
>>> sys.path
['', '/usr/local/Cellar/python@3.9/3.9.10/Frameworks/Python.framework/Versions/3.9/lib/python39.zip', '/usr/local/Cellar/python@3.9/3.9.10/Frameworks/Python.framework/Versions/3.9/lib/python3.9', '/usr/local/Cellar/python@3.9/3.9.10/Frameworks/Python.framework/Versions/3.9/lib/python3.9/lib-dynload', '/usr/local/lib/python3.9/site-packages']
>>> import chromedriver_binary
>>> chromedriver_binary.__file__
'/usr/local/lib/python3.9/site-packages/chromedriver_binary/__init__.py'
>>> 

% cd /usr/local/lib/python3.9/site-packages/chromedriver_binary/
kimi@Persimmon chromedriver_binary % ls -al
total 34840
drwxr-xr-x    6 kimi  admin       192 12 16 17:08 .
drwxr-xr-x  198 kimi  admin      6336 12 16 17:08 ..
-rw-r--r--    1 kimi  admin       743 12 16 17:08 __init__.py
drwxr-xr-x    4 kimi  admin       128 12 16 17:08 __pycache__
-rwxr-xr-x    1 kimi  admin  17822344 12 16 17:08 chromedriver
-rw-r--r--    1 kimi  admin      4525 12 16 17:08 utils.py
% mv chromedriver chromedriver.old
% cp ~/Downloads/chromedriver_mac64/chromedriver .
% ls
__init__.py		chromedriver		utils.py
__pycache__		chromedriver.old