ADmitMac for CAC 2.0 for Mac can be downloaded from our website for free. This software for Mac OS X is an intellectual property of Thursby Software Systems, Inc. The program lies within Security Tools, more precisely General.
From the developer:
ADmitMac for CAC(AFC) securely integrates U.S. Department of Defense Common Access Cards (CAC) with Apple Mac computers. AFC provides a single sign-on environment, verifying a CAC against a centralized network authority. AFC obtains Kerberos tickets using CAC certificates, makes these tickets available to "Kerberized" applications, locks the computer upon removal of a CAC, and protects the computer from unauthorized use when it wakes from sleep.
You may want to check out more software for Mac, such as PKard, which might be similar to ADmitMac for CAC.