machine authentication certificate,certification "root certificate is not trusted"

machine authentication certificate, certification "root certificate is not trusted"- why am I getting this message ?

How to delete the certificate

iMac (24-inch Early 2009), OS X Mavericks (10.9), How to reboot, restore HD

Posted on Feb 26, 2018 9:47 PM

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machine authentication certificate,certification "root certificate is not trusted"

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