Yeah. I'm aware that Apple has made some great contributions in Open Source. However, that doesn't change the fact that they live on proprietary technologies and investing in OSS is just a strategic business action.

This article here explains this: http://sealedabstract.com/rants/beyond-open-source/

The question was whether they'll make the whole OS open source, not just some bits of it. (Microsoft produces some open source, too.)