'pip install --upgrade pip'命令不适用于macOS

Question

我无法升级点，并安装包。

OSError: [Errno 13] Permission denied: '/Library/Python/2.7/site-packages/pip-8.1.2-py2.7.egg/EGG-INFO/dependency_links.txt'

You are using pip version 8.1.2, however version 9.0.1 is available. You should consider upgrading via the 'pip install --upgrade pip' command.