Guys (some of you), you are missing the point: Audio over USB, Total Integration.
The MIDI cable + constantly recording every piece over Audio method... is not a solution, that is going back in time.
Yes you are right, it's a great concept, but as you can see it's also a very vulnerable concept. I think people need to realize that such a concept requires technologies from lot's of companies. In fact Access didn't change anything here, it's Apple who we should blame because they lack "backwards compatibility". In Windows everything works fine because Microsoft does this jobs better. So every time when Apple is changing things, they expect that other companies put their time and effort in fixing things, that's not right. I know it doesn't help anyone here, but for me it's also a sign that this total integration is maybe not such a great concept on the long run. No other synth company did this as far as I know, and perhaps for a good reason...
And I also agree with ChrisCabbage, I also experienced lot's of problems with audio over USB. Lags, and especially with the Arp sometimes notes where "hanging". I switched lot's of times just to audio to have zero latency, works much better :).