drewmccormack/ensembles — pull request #86 by evands (2014-01-18 21:01:37+00:00)
Title: Less magic numbers mark II

You're right that those macros fail on older SDKs. It's better to use the named #define than a magic number, though; I've added CDEAvailabilityMacros.h which checks for the #define and declares it as needed.