That’s a rather simplistic view of things. The long and the short of it is this; it’s not Apple’s responsibility to to ensure Adobe’s software runs on their platform, it’s Adobe’s and Adobe no longer support CS6.

What is a computer if not a place for software to run on? Is it not part of the producer's responsibility to make sure software runs fine on their platform? The bond goes both ways.

Simply put, no! Certainly not if the developer of the non-functioning software no-longer supports it.