I understand your frustration, but Adobe informed Apple of the MacOS 10.10 bugs as soon as they were found. We are eagerly awaiting MacOS bug fixes just as much as you are. And Adobe does optimize for both platforms, all GPUs, and all new hardware that we have access to. If Photoshop runs better on one system, that says more about the system than the Photoshop code. Note that most of these issues did not exist in MacOS 10.7, 10.8, or 10.9 -- and were introduced in MacOS 10.10. (a few were introduced in earlier MacOS releases, and just not resolved yet)
... View more