首先直接下载官网安装包安装

https://www.python.org/downloads/

然后配置环境变量

# 打开 ~/.bash_profile
vim ~/.bash_profile

# 写入环境变量，保存
export PATH="/Library/Frameworks/Python.framework/Versions/3.10/bin:${PATH}"
alias python="/Library/Frameworks/Python.framework/Versions/3.10/bin/python3"

# 令环境变量生效
source ~/.bash_profile

如果是新的mac系统，关闭终端重新打开时，需要再次运行source才能使用python

此时需要修改～/.zshrc

# 打开 ~/.zshrc
vim ~/.zshrc

# 写入环境变量，保存
export PATH="/Library/Frameworks/Python.framework/Versions/3.10/bin:${PATH}"
alias python="/Library/Frameworks/Python.framework/Versions/3.10/bin/python3"

# 令环境变量生效
source ~/.zshrc