直接在terminal下运行以卸载node和nvm：
sudo rm -rf /usr/local/{bin/{node,npm},lib/node_modules/npm,lib/node,share/man/*/node.*}
在安装node时提示：node-7.2.1 already installed, it's just not linked 导致无法运行node命令
sudo brew uninstall node brew update brew upgrade brew cleanup brew install node sudo chown -R $(whoami) /usr/local brew link --overwrite node brew postinstall node 然后运行 node -v可以看到安装的node版本了