Security Certificate Installation on macOS
Please note: The certificate must be installed from a user account with Administrator privileges.
Download the certificate installer to your computer, then right-click on the file in the Downloads menu and choose Show in Finder.
Right-click the file icon and select Open from the shortcut menu. You will receive a security prompt asking you to confirm opening the file. Click Open to launch the program.
A terminal window will open, asking for the login password of your user account. Enter your password (the terminal window will not show the characters as you type) and press the return key on your keyboard.
You should see a Success! message indicating certificate installation was successful. The terminal window can now be closed.