Generally, pro-audio users lag behind on OS updates and hardware updates. Apple generally has problems with audio with every new generation, and this is nothing new. When you count on something to work, you tend to buy the old models.. you tend to run the previous known good OS... you tend to avoid updating anything as much as possible. This is only getting worse as apples software and hardware quality are severely degrading over the past few years. Pro users are leaving left right and center.