What do you mean by "connect with a CS6 user" ?
im trying to connect with a CS6 user
I assume you mean collaborate (or share files)?
In part, the answer depends on which Adobe product(s) you're actually using. The answer can differ depending on the app.
Yes a CS6 user who is on a PC.
We would be using InDesign.
I'm sure what you mean by collaborate vs sharing but we would work together where I would need him to be able to make changes to the document,
It's 2014 and it amazes me that that this keeps coming up.
Mac and Windows are 99% compatible. Your issue is with InDesign versions not
CS6 is included in your CC subscription. If you're working with people on
CS6 then download it and use that for those jobs.