You are correct - there are several Apple based software programs that utilize Quick Sync video. Unfortunately, there are currently no plans for the Intel Media SDK to be supported on OS X. We are working closely with Apple to come up with a solution that helps both developers and customers moving forward. We're limited in what we can discuss in a public forum, but if you'd like to learn more about Intel Media SDK and our future plans, please contact me directly - email@example.com.
Intel Media SDK Product Manager