To determine what card stock you have, look at the back of your CAC above the magnetic strip. Note: CACs are currently made of different kinds of card stock. Verify that your CAC certificates are recognized and displayed in Keychain Access.In Finder, navigate to Go > Utilities and launch KeychainAccess.app.Safari and Google Chrome rely on Keychain Access properly recognizing your CAC certificates. Configure Chrome and Safari, if necessary.This can make it appear that your certificates are issued by roots other than the DoD Root CA 2 and can prevent access to DoD websites. These instructions walk through adjusting the trust settings on the Interoperability Root CA (IRCA) > DoD Root CA 2 and the US DoD CCEB IRCA 1 > DoD Root CA 2 certificates to prevent cross-certificate chaining issues. Address the cross-certificate chaining Issue.Please refer to this page for specific installation instructions. In order for your machine to recognize your CAC certificates and DoD websites as trusted, the installer will load the DoD CA certificates on OS X. The OS X Smartcard Services Package allows a Mac to read and communicate with a smart card. Download and install the OS X Smartcard Services package.In addition, please review the DoD CAC Reader Specifications for more information regarding card reader requirements. At this time, the best advice for obtaining a card reader is through working with your home component. Typically Macs do not come with card readers and therefore an external card reader is necessary. You can get started using your CAC on your Mac OS X system by following these basic steps:

Cac card mac