说明：  mac os入门资料,介绍了mac os平台编程的一些事项和编程入门,基础知识的讲解,等等,如果第一次接触mac编程,一定不能错过
(mac os entry information on the mac os platform programming some of the issues and programming to introduce the basic knowledge of the talks, and so on, if the first contact with the mac programming, must not be missed)