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The Definitive Source for Everything CAC

  Common Access Card help for your

Personal Mac Computer


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Apple Tiger logo

Tiger [10.4.x]

Released on 29 April 2005


You may be able to use your CAC with your [Tiger (10.4.11)] Apple computer

Download / Save this page as a single / printable PDF


Other versions of Mac OS X supported in this website:

Big Sur (11.0) users, utilize the Big Sur support page

Catalina Catalina tiny image (10.15.x) users, utilize the Catalina support page

Mojave Mojave tiny (10.14.x) users, utilize the Mojave support page

High Sierra Mac OS High Sierra image(10.13.x) users, utilize the High Sierra support page

Sierra Mac OS Sierra(10.12.x) users, utilize the Sierra support page

El Capitan el Capitan(10.11.x) users, utilize the El Capitan support page

Yosemite Yosemite image (10.10.x) users, utilize the Yosemite support page

Mavericks Mavericks logo (10.9.x) users, utilize the Mavericks support page

Mountain Lion  Apple Mountain Lion logo(10.8.x) users, utilize the Mountain Lion support page

Lion Apple Lion logo (10.7.x) users, utilize the Lion support page

Snow Leopard Apple Snow Leopard logo (10.6.x) users, utilize the Snow Leopard support page

Leopard Apple Leopard logo (10.5.x) users, utilize the Leopard support page



GEMALTO TOP DL GX4 144 CACs should work with the ActivClient.Mac_3.00.16_FIXS1104025 update file.  I have been unable to find any 3rd party products that have software to support this old version of Mac OS X 10.4.x

Gemalto 144 CAC image


The following CACs are NOT compatible with Tiger and ActivClient 3.0 for Mac.


Oberthur ID One 128 v5.5 Dual

Oberthur 5.5 CAC image


Oberthur ID One 128 v5.5a D

Oberthur 5.5a CAC





G&D FIPS 201 SCE 3.2

  G&D FIPS 201 SCE 3.2 CAC image 




You'll have to install Windows in a virtual environment to be able to use Lotus Forms and ApproveIt.

NOTE:  Your computer must have an Intel processor.


IF the lack of Lotus Forms and ApproveIt for Mac "bothers" you, I recommend you contact the Army Publishing Directorate and let them know your thoughts:  703-692-1306 Monday - Friday 0700-1700 EST, Webform, or



A 100% success rate fix for users with the GEMALTO TOP DL GX4 144 CAC [and Intel Chip] is to upgrade your computer to Snow Leopard.  However, if you have a PPC chip this is not possible and it may be time for a new computer. 

NOTE:  Your computer must have an Intel processor.



The following information is provided for your situational awareness while setting up your CAC on your Mac.  It is updated as additional information is available and your input is appreciated for solutions not outlined here.  Installation instructions can be found below.

ActivClient is a middleware program used by the DoD to facilitate the communication between your Windows computer and your Common Access Card.  It is required for “Tiger” (Mac OS X 10.4.11).  The software is available below


Lotus Forms is currently ONLY available for Windows.  You will have to install Windows in a virtual environment or use Apple's native Boot Camp (see next section below) to be able to use Lotus Forms and ApproveIt.  NOTE:  Your computer MUST have an Intel processor. 

An older version of PureEdge [with a few tweaks] is available here for Macs with Intel processors only.  So, IF you only need to complete a form (and NOT sign it) give it a try.

Windows on your Mac (You MUST have an Intel processor, it will NOT work with a PPC processor):  While you have made a conscious decision to “be a Mac,” the Government has not, and therefore the easiest solution for some problems, such as:  Digitally signing forms with Lotus Forms and ApproveIt, some websites (including digitally signing / encrypting emails in OWA), is to use Windows through a Virtual Machine, such as Parallels Desktop (PDF), VMware Fusion, (Parallels vs. VMware comparison), or VirtualBox, or through Apple’s native Boot Camp.  This will require you to have a legal copy of Microsoft Windows.  With these programs, you can install the ActivClient, Lotus Forms, and ApproveIt software and also utilize all the DoD tools from your Mac.  The benefit of the Virtual Machines over Boot Camp is that it will allow you to run Windows as an additional program (without restarting your computer) and keep OS X running the entire time. 


DTS (Defense Travel System) uses a Java web applet and should allow you to use DTS from your Mac. 

NOTE:  If you see a blank page after successfully logging into DTS trying to navigate to your authorizations or vouchers, Click the word Safari, uncheck Block Pop-Up windows. 


DCO (Defense Connect Online) does NOT work on 10.4.11 (Tiger).


CAC Readers:  My initial setup was completed using an SCR-331 USB reader after updating the firmware to be able to read my GEMALTO TOP DL GX4 144 CAC.

Please look at
USB readers page or the keyboards page to see which readers are compatible with Tiger


Outlook Web Access / App (OWA):  Would NOT work on TigerIf you do happen to get it to work, please know that the use of OWA on Mac currently has a known issue with time outs.  Beware that when using OWA on your Mac that if you are inactive on the primary window, for example: the Inbox, while replying to an email, your browser may time out.  On a Windows computer the ActivClient software maintains communications with the server and re-requests validation of your credentials.  On a Mac this is not so, Safari will respond to a direct request for validation of your credentials, however it will not re-request that you verify as the server requires.  Be sure that prior to selecting the Send button that you copy your work to the clipboard as you will most likely have to restart Safari and log back in.  You also will not be able to digitally sign / encrypt / decrypt emails since the S/MIME software is proprietary for Microsoft Internet Explorer (32 bit) only, therefore, it doesn't exist for a Mac.


Internet Explorer Emulation (NOT applicable to OWA):   If you visit a website with your Mac that states it can only be accessed via Internet Explorer, or some web pages simply won't work while using your CAC with Safari, please try this:  Open Safari, Click on the word Safari (in the bar at the top), select Preferences..., Advanced, click the Show Develop menu in the menu bar box.  Close Advanced screen.  Now when you need to emulate IE, click on the word Develop (at the top), click User Agent, then select Internet Explorer 7 or 8.  This was received from the Air Force IMA JAGs.


Air Force Users look here for some helpful information


Navy Users look here for some specific information


 Setting up your CAC for use on your Tiger (10.4.x) Mac:

Step 1: Update your system.  (10.4.11 is the last version of Tiger)

Tiger Software update list image


Step 2: Plug in your SCR-331 (or other compatible) CAC Reader to an available USB Port

Step 3: Click the Apple Icon in the upper left corner of your desktop and select "About This Mac"

  Apple About this Mac image


Step 4: Click the "More Info" Button in the window that pops up. (This opens System Profiler)

  Tiger About this Mac image 

Step 5: Within the "Hardware" Category select "USB." On the right side of the screen the window will display all hardware plugged into the USB ports on your Mac. You should see “SCRx31 USB Smart Card Reader.”  If the Smart Card reader is present, it is installed on your system, and no further hardware changes are required, e.g. additional drivers / Firmware upgrades.  You can now Quit System Profiler.  NOTE:  Please look at Version:  if you are using an SCR-331 Reader make sure the version is 5.25, you are good to go.  If it is below 5.25, please update your firmware.

  Tiger System profiler showing USB image

Step 6: Install ActivClient v3.0 for Mac  (alternate download)


Step 7: Install the ActivClient.Mac_3.00.16_FIXS1104025 update file (alternate download

Instructions for installing update file.

Step 8: Insert your CAC into the reader and navigate to the CAC enabled website you want to access.

NOTE: Not every site will work.  I was successful with AKO, Air Force Portal, and DTS.  I was NOT successful with USAR OWA, or DEERS address update



If you are still having problems, contact us, and we'll try to assist.

 If you have questions or suggestions for this site, contact Michael J. Danberry



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