Opencv Pre-build mac

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Hello, I'm realy a noob, so sorry if my question seems stupid, but why there is no pre-build version for mac (as the win version) ?

I want to use Opencv Java (2.4.4 or 2.4.5 version) with processing on mac Mountain Lion, and i don't unterstand how do this from the opencv source code, if you know a tutorial or if you have explanation to do this, this will be very helpful.

Thanks you for your help !