I tried downloading from that website and I still get the same message. We have a subscription through a business account. I had it on my old MacBook and now want to download it to my new MacBook Pro.
I am getting the same error and I have a personal license.
CS6 and earlier programs have not been tested and will not be updated for Mac El Capitan/Sierra
-which means that you try to use CS6 and earlier at YOUR risk of having problems due to Apple updates
-Adobe has a fix to Apple's problem of not maintaining backward compatibility in El Capitan/Sierra
--several help links inside this message https://forums.adobe.com/thread/2301916
-also install OLD Java runtime if needed https://support.apple.com/kb/dl1572?locale=en_US