错误提示：
(1). stderr: xcode-select: error: tool 'xcodebuild' requires Xcode, but active developer directory '/Library/Developer/CommandLineTools' is a command line tools instance
(2). An unknown server-side error occurred while processing the command. Original error: Could not determine Xcode version: Could not get Xcode version. /Library/Developer/Info.plist does not exist on disk.
说明xcode不是系统的默认环境
解决方案：
sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer/