How to Understand the GUI API of macOS?

3 points_wk473 comments

How could one go about probing the internals of macOS to learn about the API driving it's GUI? It would be useful while providing GUI handling capabilities using a language not supported by Apple.

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not macos user, but may I suggest alternatives such as HTML or Python Qt or maybe python fire+gooey?

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Any reading material (physical/online) which might help me?

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