报错如下：
[MJSONWP] Encountered internal error running command: Error: Xcode version [object Object] is not yet supported
at handleUnsupportedXcode (lib/simulator.js:15:11)
at getDeviceString$ (lib/simulator.js:44:3)
at tryCatch (/Applications/Appium.app/Contents/Resources/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:67:40)
at GeneratorFunctionPrototype.invoke as _invoke
at GeneratorFunctionPrototype.prototype.(anonymous function) as next
at GeneratorFunctionPrototype.invoke (/Applications/Appium.app/Contents/Resources/node_modules/appium/node_modules/babel-runtime/regenerator/runtime.js:136:37)
at run (/Applications/Appium.app/Contents/Resources/node_modules/appium/node_modules/babel-runtime/node_modules/core-js/library/modules/es6.promise.js:104:47)
at /Applications/Appium.app/Contents/Resources/node_modules/appium/node_modules/babel-runtime/node_modules/core-js/library/modules/es6.promise.js:115:28
at flush (/Applications/Appium.app/Contents/Resources/node_modules/appium/node_modules/babel-runtime/node_modules/core-js/library/modules/$.microtask.js:19:5)
at _combinedTickCallback (internal/process/next_tick.js:67:7)
at process._tickCallback (internal/process/next_tick.js:98:9)

Xcode version set to 8.1