提示“system root”无法打开密钥,我们需要手动的吧“。cer”文件拖到登陆密钥中。,如图
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I've just had the same problem. For some reason Keychain Access wants to add to the System Roots keychain if you double click on the certificate. The only way round I found was to drag and drop on to a specific keychain, so "System" for AppleWWDRCA.cer and "login" for my development certificate.