APPLE MACINTOSH COMPUTER SUPPORT PAGE for BIG SUR (currently 11.2)
utilizing an Intel chip. If you have the new M1 chip, please look here for support
Big Sur [11.x]
I have Mac OS Big Sur on an Intel based Mac, and am able to access CAC enabled websites using the native smart card, and adding the DoD certificates from step 5 on https://militarycac.com/macnotes.htm
Mac OS 11.xx.x would not read the "G+D FIPS 201 SCE 7.0" CAC with the SCR-3310 v2.0 reader with firmware Version below 6.02. So, if your reader is below 6.02, you may need to purchase a new reader.
If you are having
problems unlocking your settings in System
Preferences due to it not accepting your administrator password or
your CAC seemed to have stopped working after upgrading to Big Sur, please
verify if your Mac has a
Security Chip. If your computer does, then
your SMC (System Management Control) by powering down your computer,
then holding the power button for 10 seconds. Then turn your computer
on, you've just reset your SMC. This information was found at:
If you are having problems unlocking your settings in System Preferences due to it not accepting your administrator password or your CAC seemed to have stopped working after upgrading to Big Sur, please verify if your Mac has a T2 Security Chip. If your computer does, then reset your SMC (System Management Control) by powering down your computer, then holding the power button for 10 seconds. Then turn your computer on, you've just reset your SMC. This information was found at: https://support.apple.com/en-us/HT203127.
I ordered a new Mac on 12 November 2020 with the non Intel chip (M1) my findings from this computer can be seen on this page. My only "fear" with the new chip is compatibility with Virtual Machines (running Windows for certain DoD websites)
Mac users who upgraded to Mac OS Big Sur (11.xx) need to uninstall all 3rd Party CAC enablers per https://militarycac.com/macuninstall.htm
If you purchased your Mac with Big Sur (Intel chip), you can skip the Macuninstall page, and go directly to the MacNotes page
How to sign a PDF using Adobe
Please verify these settings on your Mac:
Open an Adobe PDF file,
Select the words Adobe Reader [or Acrobat Reader] (at the top of the screen)
Under Categories, scroll down to Signatures
In the Creation and Appearance section, click More
Make sure Enable CryptoTokenKit framework support is checked.
You also need to change the Default Signing Format from PKCS#7-Detached to CAdES-Equivalent
Close Adobe Reader
Double click an Adobe PDF file you need to sign
Problems accessing DTS?
You have to use the Safari web browser (Chrome has not worked for anyone)
Select the Show Details (button)
Click the link titled: visit this website
Click the button that shows: Visit Website
Enter your computer password, [you are manually adding the web address to your keychain access].
Click Update Settings (button)
DTS should now open for you.
I have added some sites I know are having this issue here. You can download the certificates you need. Then will only need to double click it and do a manual trust on them.
Here's How to manually trust the certificate(s): Double click the certificate, select the triangle next to Trust, in the When using this certificate: select Always Trust.
Air Force and Coast Guard users who utilize VMware Horizon need to update their client
Here is the link:
You will see in Table 1 that no CAC enablers are compatible with Mac OS Big Sur.
Discounted prices on the programs mentioned below can be viewed here
If you have questions or suggestions for this site, contact Michael J. Danberry
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Last Update or Review: Monday, 01 February 2021 20:02 hrs
The following domain names all resolve to the same website: ChiefsCACSite.com, CommonAccessCard.us, CommonAccessCard.info, & ChiefGeek.us