执行命令行otool -l ting时出现xcrun: erro

xcrun: error: active developer path ("/Applications/Xcode 7.1.app/Contents/Developer") does not exist, use xcode-select --switch path/to/Xcode.app to specify the Xcode that you wish to use for command line developer tools......

解决方法：
终端执行命令:

sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer

然后再输入一次系统的密码，完成。

参考链接