I'm not able to use my SD card on my MacBook Pro after I upgraded the OS to El Capitan. I tried to reset PRAM without success. Consider that if I put the SD card on another Mac. HID ActivID ActivClient 4.0.1.92 CAC and PIV Middleware for Mac This package includes 1 license for 1 user - ActivIdentity Part Number: ACCXXXXLA This package does not include a smart card nor a smart card reader. ActivClient supports standard US government-issued smart cards such as CAC and PIV. ActivClient is the main DoD CAC software. Starting with 10.11.4, my military CAC card cannot be seen by either Keychain Access or pcsctest (SCardGetStatusChange hangs). Rolling back to 10.11.3 works. System Report says the USB card reader is there. I've removed all CAC related software, rebooted, installed CAC related software, rebooted, all to no avail.
Mac OS X DirectionsRocketek CAC Smart Card Reader - DOD Military USB Common Access Card Reader - Compatible with Windows XP/Vista/7/8/10, Mac OS X / RT-SCR1 ID / IC Bank Card Reader by Rocketek 4.2 1,331. Mac OS X requires the installation of a 'Middleware' to use a CAC/PIV card. If your organization did not provide it to you, you can purchase it from our web site. This middleware works with all CAC/PIV cards on Leopard, Snow Leopard, Lion, Mountain Lion, Mavericks, Yosemite, El Capitan, Sierra, High Sierra and Mojave: HID ActivClient for Mac OS X.
Mac OS X requires the installation of a 'Middleware' to use a CAC/PIV card. If your organization did not provide it to you, you can purchase it from our web site. This middleware works with all CAC/PIV cards on Leopard, Snow Leopard, Lion, Mountain Lion, Mavericks, Yosemite, El Capitan, Sierra, High Sierra and Mojave:HID ActivClient for Mac OS X.