测试环境：Appium 1.4.13
Appium 报错日志：

info: [debug] Couldn't find ideviceinstaller, trying built-in at /Applications/Appium.app/Contents/Resources/node_modules/appium/build/libimobiledevice-macosx/ideviceinstaller

error: Could not initialize ideviceinstaller; make sure it is installed and works on your system