在安装 appium 后启动成功，运行中出现这个错误。
已经安装 xcode7.1 以及 command line tools。
在网上找到相似问题http://stackoverflow.com/questions/32724616/appium-error-could-not-get-xcode-version。
解决方案为：
Had the same issue, the problem was that the path to XCode was in Appium was set to something like "xcode/library/developer/commandlinetools". Setting the correct path to Xcode (in my case: "MacintoshHD/Applications/Xcode 2") in the advanced iOS Settings solved the problem for me.(Xcode 7, Appium 1.4.13)
没整明白怎么处理，还请各位大神帮忙？