Adobe Creative Cloud is platform independent.You can use it on both MAC and WINDOWS.
You can activate the membership on 2 machines, however can use it only on 1 at a time.
Hope this helps.
As it can be activated on 2 computers only , if you wish to activate on 3'rd computer , Sign out from any of computer on which you had activated subscription in order to activate on 3'rd computer .
You can swap activations by Signing out and Signing in , if you wish to maintain CC individual subscription on 3 comps.
Refer below link :