error: Appium will not work if used or installed with sudo. Please rerun/install as a non-root user. If you had to install Appium using `sudo npm install -g appium`, the solution is to reinstall Node using a method (Homebrew, for example) that doesn't require sudo to install global npm packages.
stady(回复于：2018-03-30 09:03:43)
出错原因:
权限问题,无法使用sudo来运行appium
解决办法:
步骤1、改变node的所有者
cd /usr/local/lib
sudo chown -R [username] node_modules
步骤2、卸载appium
npm uninstall appium -g
步骤3、重新安装appium
npm install -g appium
步骤4. 启动
appium &
步骤5. 查看是否运行成功
浏览器打开：
http://0.0.0.0:4723/
显示：
That URL did not map to a valid JSONWP resource
说明成功