appium-doctor

1.   I installed appium-1.5.3.dmg But when I click the stethoscope button the Appium is show error :

 Xcode is installed at: /Library/Developer/CommandLineTools
[Error: Could not detect Mac OS X Version from sw_vers output: '10.12
']

解决方法：

https://stackoverflow.com/questions/40129794/how-to-fix-error-could-not-detect-mac-os-x-version-from-sw-vers-output-10-12

2. 

安装node.js