如何在 Mac 上将 Python 的默认版本设置为 3.0.0

Question

The Python's default version is 2.7.0 on my MacOS,

python --version
Python 2.7.16

python3 --version
Python 3.9.9

and Python3 has been installed via homebrew, how to make it as default? I want to make it point to the correct directory instead of using alias.

type -a python        
python is /usr/bin/python

type -a python3
python3 is /opt/homebrew/bin/python3
python3 is /usr/bin/python3

Also, it would be very grateful if you can help with pip also. So far only pip3 has been installed.

type -a pip 
pip not found

type -a pip3
pip3 is /opt/homebrew/bin/pip3
pip3 is /usr/bin/pip3

Answer 1

Generally doing this can impact legacy programs reliant on Python 2.x , but the below was taken from a website to demonstrate how to change the default .

How to set Python3 as a default python version on MacOS?

This has been answered on this website, and the below are snippets from the website

https://dev.to/malwarebo/how-to-set-python3-as-a-default-python-version-on-mac-4jjf#:~:text=Change%20Python%20Version%20MacHow%20to%20set%20Python3%20as,how%20it%20should%20be%20done%3A%20More%20items...%20

Look where python is installed & view the output.

ls -l /usr/local/bin/python*

Change the default python symlink to the version you want to use from above. Note that, we only need to choose the one that end with python3.*. Please avoid using the ones' that end with config or python3 **.*** m or python3 .* m-config . Below command shows how it should be done:

ln -s -f /usr/local/bin/python3.7 /usr/local/bin/python

Close the current terminal session or keep it that way and instead open a new terminal window

python --version