AuthorizationExecuteWithPrivileges in Xamarin.Mac

参考文档吧：

http://www.michaelvobrien.com/blog/2009/07/authorizationexecutewithprivileges-a-simple-example/

http://blog.csdn.net/ani_di/article/details/6574210

http://stackoverflow.com/questions/3588779/obtaining-admin-privileges-to-delete-files-using-rm-from-a-cocoa-app/6269915#6269915

http://forums.xamarin.com/discussion/comment/9680#Comment_9680