Perfect! I just imported them. Now, I can't seem to get my Armory client online to check my balance with the blockchain and download a database. Is Armory online feature not available on mac?
I'm sure that feature is available, but I'm afraid I know next to nothing about OS X and so I probably can't help you very much...
Just like on other OS's, you do need Bitcoin Core installed and synced. Have you done that yet?