I develop Mac software for free and release the source under GPL. The two ideas aren't completely incompatible (though one is perhaps more likely to find share

I develop Mac software for free and release the source under GPL. The two ideas aren't completely incompatible (though one is perhaps more likely to find shareware than freeware on the Mac, and shareware isn't typically open-sourced). It's more a question of how "pure" your environment is. Yes, technically, if Apple decided to radically change something about my system, there is a chance I may not be able to access some application or data after an upgrade (once it's "closed"). But it would also be extremely stupid of them to alienate their customer base in such a way. So for all practical purposes, there is no real risk. And I am willing to accept that minimal risk. It also helps that the company has decided not to make complete garbage, and actually makes a useful product. In such a case, why shouldn't it have my money?