>退出Xcode.>在终端中运行以下命令:
mkdir ~/Library/Developer/Xcode/OldPortalDBs; mv ~/Library/Developer/Xcode/connect1.apple.com* ~/Library/Developer/Xcode/OldPortalDBs
>启动Xcode并重试!
有关更多详细信息,请参阅Apple Developer Forums的官方文章.