具体错误描述
The "System.Roots" keychain cannot be modified.
To change whether a root certificate is trusted, open it in Keychain Access and modify its Trust Settings. New root certificates should be added to the login keychain for the current user, or to the System keychain if they are to be shared by all users of this machine.
原因
主要错误的原因就是 ----> AppleWWDRCA (Apple Worldwide Developer Relations Certification Authority) 证书过期了。所以只需要更新一下证书就行了，并放到 keychain 中的 login 目录中。
证书下载地址
developer.apple.com/certificati…
