更换mac电脑后证书过期的解决办法

http://stackoverflow.com/questions/32821189/xcode-7-error-missing-ios-distribution-signing-identity-for

1. Download https://developer.apple.com/certificationauthority/AppleWWDRCA.cer
2. Double-click to install to Keychain.
3. Then in Keychain, Select View -> "Show Expired Certificates" in Keychain app.
4. It will list all the expired certifcates.
5. Delete "Apple Worldwide Developer Relations Certificate Authority certificates" from "login" tab
6. And also delete it from "System" tab.

Now you are ready go.

更换mac电脑后证书过期的解决办法

原文：http://www.cnblogs.com/matoo/p/5210897.html