Sometimes I wonder why I even read
/. comments. They are so fucking predictable.
First off, you don't have to pay Apple anything to make Mac apps (besides owning a Mac and honestly if you don't own and use a Mac you have not business developing for it). There is a paltry $99 per year fee to make iPhone/iPod/iPad apps but no one is forcing you to make iPhone apps. On a side note, you have to pay RIM, Palm and Google money if you want to get in their app stores as well so they must be "open technology abusers" as well.
Here is some of Apple's open source code: http://www.opensource.apple.com/
Maybe you should download a few Gigs of source code before you start talking shit about something you don't know about.
Apple makes iOS which is based on OS X and puts it on iPhones, iPads and iPods. They took their own OS (which I might add has a large amount of open source code in it and more coming at fairly steady intervals). Read that again, "they took their own OS". The OS they spent years making and invested tons of time/money into. They give every person who owns an OS X license a free copy of their entire development stack: Xcode, Interface Builder, Dashcode, Instruments, Quartz Composer, PackageMaker, FileMerge, etc, etc, etc. They arguable provide the most complete set of frameworks available for any platform (Cocoa/CoreFoundation) to developers. You can build a Mac or iPhone app with GCD (open source). Apple has provided piles of code to the GCD project. You can now build Mac and iPhone apps with LLVM (open source). Apple has provided piles of code to the LLVM project.
So, given that information (and taking into account that Apple is a business that needs to make money to survive) why on earth do they need to allow someone to make Mac apps on Linux/Windows? You don't make any fucking sense man. None at all. Have you seen the cost of Microsoft's developer tools recently? And don't bother mentioning the "Express" versions of their software that don't allow commercial products.
To sum things up, many readers of
/. would like every company on earth to make everything "open and free" no matter what the cost to said company. If a company does not do this, they will get piles of complaints from slashdotters who wouldn't do anything different even if said company did make something "open".