安装Homebrew

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/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

别忘记添加环境变量

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(echo; echo 'eval "$(/opt/homebrew/bin/brew shellenv)"') >> /Users/nanyancc/.zprofile
eval "$(/opt/homebrew/bin/brew shellenv)"

查找并安装Python

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nanyancc@nanyanccdeMacBook-Air ~ % brew search python3
==> Formulae
boost-python3             python@3.11               python@3.8                ipython                   jython
python@3.10               python@3.12               python@3.9                bpython                   cython

If you meant "python3" specifically:
It was migrated from homebrew/cask to homebrew/core.

nanyancc@nanyanccdeMacBook-Air ~ % brew install python@3.12
......
......
Python has been installed as
  /opt/homebrew/bin/python3

Unversioned symlinks `python`, `python-config`, `pip` etc. pointing to
`python3`, `python3-config`, `pip3` etc., respectively, have been installed into
  /opt/homebrew/opt/python@3.12/libexec/bin

See: https://docs.brew.sh/Homebrew-and-Python

添加 Homebrew 安装的 Python 和 pip 路径

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nano ~/.zshrc  # 如果使用的是 zsh
# 或者
nano ~/.bash_profile  # 如果使用的是 bash

在打开的配置文件末尾添加以下内容：

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export PATH="/opt/homebrew/opt/python@3.12/libexec/bin:$PATH"

立即生效

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source ~/.zshrc  # 如果使用的是 zsh
# 或者
source ~/.bash_profile  # 如果使用的是 bash

完成以上步骤后，pip 和 python 命令将会使用 Homebrew 安装的版本。你可以通过以下命令验证路径是否正确：

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which pip
which python

这应该会输出 /opt/homebrew/opt/python@3.12/libexec/bin/pip 和 /opt/homebrew/opt/python@3.12/libexec/bin/python。