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> It's not easy to fix in the code either because it'll require major changes to the GUI library which can get messy, especially since GUIs were never a strength of Go.

There just doesn't seem to be a lot of viable competition to web based UIs these days.

If you're using a portable library that needs to render graphics on mac, it's probably using OpenGL to do it unless it has a platform-specific backend.

Historically, yes. These days it might well be using wgpu.

Immediate mode UI toolkits are designed for pluggable backends, some even can discover the appropriate backend at runtime. If you're writing a game, you're expected to (and actually, you must) build your own integration.

ImGUI and Nuklear each have 20+ backends in their repos: <https://github.com/ocornut/imgui/tree/master/backends> <https://github.com/Immediate-Mode-UI/Nuklear/tree/master/dem...>