If you have a CS6 licensed version then you would need to request a platform swap to be able to use CS6 on the Mac. Order product | Platform, language swap
If you subscribe to the Cloud then you could have it installed on either or both machines since the Cloud allows for mixed platform use.
Thank you. If I get Cloud and have it on both my PC and Mac do I only the the $9.99 for both or it is doubled?
The single subscription allows for installation on two machines, and they can be mixed platforms.