sudo rm -rf /usr/local/{bin/{node,npm},lib/node_modules/npm,lib/node,share/man/*/node.*}
/User/nyan/.npm

sudo rm -rf ~/.npm

sudo rm -rf ~/.node-gyp

sudo rm /opt/local/bin/node
sudo rm /opt/local/include/node
sudo rm -rf /opt/local/lib/node_modules

mac uninstall node ,npm from official