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In reply to Fixing the Breakage from the AddTrust External CA Root Expiration
I got my MacBook Air in 2014 and never updated it until now, my mistake I know. I am not able to access any websites, such as university websites that use the ADDtrust CA root certificate. I already deleted the expired, and all other expired certificates from my keychain. I am not sure how to get the new and updated certificate onto my computer. Please let me know if you can help me with this.
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