多谢楼长提醒,补充如下
从https://developer.apple.com/library/mac/samplecode/SMJobBless/Introduction/Intro.html#//appleref/doc/uid/DTS40010071-Intro-DontLinkElementID2下载的苹果官网例子SMJobBless(菜单条程序例子)
用xcode打开后直接编译失败,弹出提示框No signing identity found(Xcode can request a new Mac Development signing identity for you.)