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Hello, I'm really interested in computer graphics. I started to learn how to create a window in objective-c with cocoa but I would like to learn how does it work exactly. So I've read about X11 but to create a window we still have to install XQuartz. I would like to learn how to create my own graphics from scratch even if it requires a lot of time. Do you have any suggestion to learn more about how does windowing system works on MacOS or we have to use frameworks and programs to make everything work? And if it is not possible, can you explain to me why we can't do that or what makes it that complicated? Thanks in advance.

Hi their,As a student in computer science, I would like to know if I can publish content from the Apple Open Source website on my blog. Is it legal as it is Open Source or we need a special licence to do this?