I think Apple is missing out on both a lot of goodwill but also overall progress of their Unix core by being so closed. Instead they should actively contribute

I think Apple is missing out on both a lot of goodwill but also overall progress of their Unix core by being so closed. Instead they should actively contribute source-code to the BSD-ecosystem. Apple has a lot to gain long-term from the BSD-ecosystem being healthy. Also, the whole Hackintosh thing is completely overblown. So what if some intrepid coder gets it running on a non-apple machine. It won't affect their sales the tiniest bit.