前言
本例采用brew安装。未安装brew，参考Mac 安装Brew。
安装步骤
search
brew search python3
==> Formulae
boost-python3 python3 ✔ python@3 ✔ python@3.8
If you meant "python3" specifically:
It was migrated from homebrew/cask to homebrew/core.
Install
brew install python3
bash_profile
vi ~/.bash_profile
alias python="/usr/local/bin/python3"
source ~/.bash_profile
查看版本
python
Python 3.7.6 (default, Apr 2 2020, 12:41:48)
[Clang 11.0.0 (clang-1100.0.33.17)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
来源：oschina
链接：https://my.oschina.net/wuxinshui/blog/4258492