%: curl https://bootstrap.pypa.io/pip/2.7/get-pip.py -o get-pip.py
%: python get-pip.py
得到大致如下内容：
pc@pcMacBook-Pro Documents % python get-pip.py
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support pip 21.0 will remove support for this functionality.
Defaulting to user installation because normal site-packages is not writeable
Looking in indexes: http://pypi.douban.com/simple
Collecting pip<21.0
Downloading http://pypi.doubanio.com/packages/27/79/8a850fe3496446ff0d584327ae44e7500daf6764ca1a382d2d02789accf7/pip-20.3.4-py2.py3-none-any.whl (1.5 MB)
|████████████████████████████████| 1.5 MB 1.6 MB/s
Installing collected packages: pip
WARNING: The scripts pip, pip2 and pip2.7 are installed in '/Users/pc/Library/Python/2.7/bin' which is not on PATH.
Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
Successfully installed pip-20.3.4
pc@deMacBook-Pro Documents % pip #无反应
然后执行：
sudo ln -s /Users/<你的路径>/Library/Python/2.7/bin/pip /usr/local/bin/pip
最后测试：
pip -V