好，把我的评论变成答案:

Ok to turn my comment into an Answer:

您将必须升级XCode安装.当前发行版本是4D502(Lion)和4C199(Snow Leopard).此外，在您的XCode版本上，"b"表示您仍在使用beta版本，通常不接受应用程序提交.

You will have to upgrade your XCode installation. The current release versions are 4D502 (Lion) and 4C199 (Snow Leopard). Also the "b" at your XCode version indicates that you are using still a beta release which are generally not accepted for app submission.

如果AppStore坚持要求您使用最新版本，请转到应用程序"文件夹并删除" XCode Installer.app ".然后，您可以再次从AppStore下载它.

If the AppStore insist that you have the latest version go to your "Applications" folder and delete the "XCode Installer.app". Then you can download it again from the AppStore.

如果您完全删除了安装，也可能不会造成任何危害，因此请转到终端并导航至XCode目录(通常为/Developer)，然后输入

It probably would also do no harm if you'd removed your installation entirely, therefore go to a terminal and navigate to your XCode directory (usually /Developer) and enter

sudo Library/uninstall-devtools --mode=all

然后从AppStore下载全新的安装程序，一切都会好起来.

Then download a fresh installer from the AppStore and you should be fine.