I already paid for Creative Cloud on my old mac. How do I transfer it to my new Mac?

You do not transfer programs... you deactivate and uninstall from the old computer if you are no longer going to use it, and then install on the new computer

Cloud License allows 2 activations http://www.adobe.com/legal/licenses-terms.html

-Install on a 2nd computer http://forums.adobe.com/thread/1452292?tstart=0

-Windows or Mac does not matter... 2 on the same operating system, or 1 on each

-Both activations MAY NOT be in use at the same time (note in the above license link)