If you are having trouble activating your CS6 application with your Creative Cloud credentials (or converting your CS6 trials to full versions using your Creative Cloud membership), these steps should help you get started:
(1) Ensure your computer is connected to the internet.
(2) Launch the product in trial mode.
(3) From the trial screen, click "License this Software"
(4) Sign in using your Adobe ID.
This will convert a trial product to a subscription licensed product so long as this same Adobe ID was used to redeem the product online. If you have any further problems redeeming your subscription, please let us know, and we'll make sure that we get you up and running as soon as possible.
If you're having trouble installing using Mac OS 10.7.4, this post may have some helpful troubleshooting information.