[madpata]

It's not a chicken and egg problem. It's Apples fault/intention.

They had really bad support for OpenGL and wanted developers to use Apple's Metal API. But developers stayed on DirectX (Windows-only) or OpenGL/Vulkan for Linux/Windows/Android crossplatform. It just wasn't economically viable to develop for Mac.

[flohofwoe]

The importance of cross-platform 3D-APIs for game development is vastly overrated though. The problems of the Mac as gaming platform are much more "holistic" (but yes, in the end it's about the economical viability).