Set Mac OS X deployment target to 10.9
Set Mac OS X deployment target to 10.9

Without it set, the build will choose the current OS version as the deployment target. 10.9 is the earliest usable, since that is when OS X introduced libc++.

opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv,opencv/opencv