由于先安装 Appium 后再安装 Xcode 获取不到 Xcode 版本, Could not determine Xcode version: Could not get Xcode version. /Library/Developer/Info.plist does not exist on disk.
解决方案:卸载 Appium,重新安装 npm uninstall -g appium npm install -g appium@1.6.3