Adobe are dragging the chain. They couldn't even release the new After Effects as a UB version for goodness sake!
Adobe left the Apple video editing market because it was getting hammered by FCS. FinalCut Pro does almost everything that AfterEffects will, and if you need any better compositing than FCS and Plug-ins offer, then you've probably got a copy of Shake. And with an app like Motion making motion graphics much less time consuming to produce, on the Mac side there is no need for After Effects. There is no money in spending the time developing AfterEffects for the new Macs.