Appium mac 安装命令行 appium 报错虽然用 sudo 命令但还是报错，可能是权限问题，npm WARN checkPermissions Missing write access to /usr/local/lib/node_modules
命令行安装 appium：sudo npm install -g appium@1.15
gyp WARN EACCES current user ("nobody") does not have permission to access the dev dir "/Users/apple/Library/Caches/node-gyp/12.16.3"
命令后增加 --unsafe-perm
sudo npm install -g appium@1.15 --unsafe-perm
