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macOS Catalina 10.15
macOS Mojave 10.14
Table of Contents

Determine if a certificate is valid using Keychain Access on Mac

Use the Certificate Assistant in Keychain Access to evaluate a certificate by looking at its trust policy to determine if it is valid.

Open Keychain Access for me

  1. In the Keychain Access app on your Mac, click Certificates in the Category list, then double-click the certificate you want to evaluate.

  2. Choose Keychain Access > Certificate Assistant > Evaluate [certificate name].

  3. Select a trust policy:

    • To evaluate an email certificate, select S/MIME, then type the email address of the sender.

    • To evaluate a web server, select SSL, then enter the host server’s URL. To ask the host for the certificates, select Ask Host For Certificates.

    • To evaluate other types of certificates, select Generic.

    • To view the information about a signed certificate, select Code Signing.

    • For an explanation about certificates and trust policies, click Learn More.

  4. Click Continue.

See alsoGet information about a certificate in Keychain Access on Mac
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