How to Import CA Certificate into Mac

Certificate import on Mac has gotten complicated with all the trust settings, Keychain options, and verification steps flying around. As someone who has configured certificates across federal Mac deployments, I learned everything there is to know about proper certificate installation. Today, I will share it all with you.

Using Keychain Access

Probably should have led with this section, honestly. Open Keychain Access from Utilities. Drag certificate files to the System keychain for system-wide availability.

Trust Settings

That’s what makes trust configuration critical—imported certificates need explicit trust for SSL and code signing. Double-click the certificate, expand Trust, and configure appropriately.

DoD Certificates

DoD root certificates require specific configuration. Your agency’s IT department can provide the correct certificate bundle and trust settings.

Verification

After import, test by accessing a site that requires the certificate. Successful connection confirms proper installation.