安装python2
mac环境
wget https://www.python.org/ftp/python/2.7.18/python-2.7.18-macosx10.9.pkg
sudo installer -pkg python-2.7.18-macosx10.9.pkg -target /
mac环境
wget https://www.python.org/ftp/python/2.7.18/python-2.7.18-macosx10.9.pkg
sudo installer -pkg python-2.7.18-macosx10.9.pkg -target /