While using a CAC on a PC may not be as easy as “plug-and-play,” DoD agencies and contractors have spent considerable resources to make the process as simple and inexpensive as possible, not just for system administrators, but for general users as well.
Instructions and almost all downloads (with the exception of third party middleware) are accessible through the Information Assurance Support Environment (IASE) website hosted by the Defense Information Systems Agency (DISA). On the IASE website, DISA hosts a PKI-PKE subsection titled, Getting Started for End Users (external link). There, users will find instructions and downloads for enabling their Windows, Mac, or Linux computers.