The license code works on Windows and on Mac.
Make sure to sign out of Adobe on the Windows PC when you don't need it there anymore.
You need to move everything that is not part of the default install of LR separately.
But with sign out from my Windows PC you mean 'exit' from my account and than sign again (with the same Adobe Account) on the iMac when I go to retrieve my Lightroom code that I imagine is downloadable again for Win and IOS... (in the meantime I took all my photo catalog and back-up images, and separately the tools on the iMac)... Is it correct??
I hope to do all the instructions in the next future! (When I buy the iMac!)
Thanks again for the patience really appreciate!
LR allows you for 2 concurrent operating LR. You need to sign in so it can "phone home" to control your account/usage and activate your installation. After validation, it runs without Internet connection until you deactivate it. Signing off on the Windows PC where you don't need LR anymore frees you one activation.
Some more information: http://www.lightroomqueen.com/lightroom-cc6-myths-confusion/
Sorry for the late and THANK YOU so much!!! (And Lightroom Queen site and book REALLY help!!!!)