Hi John! Thanks for your reply. I've tried downloading the Design Standard collection.
I gives me a message that says a file is missing (see attached).
I'm not sure how a file could be missing .. when I've downloaded the one .dmg file.
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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
-Apple did not maintain backward compatibility with old programs in El Capitan or Sierra
--Adobe has a workaround to Apple's problem of not maintaining backward compatibility
--help links and Adobe solution to Apple's problem in this message https://forums.adobe.com/thread/2301916