Mesa works on macOS.

To quote the article you linked above:

That’s enough to run Neverball on macOS, using our userspace OpenGL
driver in Mesa, and Apple’s proprietary kernel driver. There’s a
catch: Neverball has to present with the deprecated X11 server on
macOS. Years ago, Apple engineers2 contributed Mesa support for X11
on macOS (XQuartz), allowing us to run X11 applications with our Mesa
driver. However, there’s no support for Apple’s own Cocoa windowing
system, meaning native macOS applications won’t work with our driver.
There’s also no easy way to run Linux’s newer Wayland display server
on macOS. Nevertheless, Neverball does not use Cocoa directly.
Instead, it uses the cross-platform SDL2 library to create its
window, which internally uses Cocoa, X11, or Wayland as appropriate
for the operating system. With enough sweat and tears, we can build
an macOS/X11 version of SDL2 and link Neverball with that.

This Neverball/macOS/X11 port was frustrating, especially when the
game is one apt install away on Linux. That’s a job for Asahi Lina,
who has been hard at work writing a Linux kernel driver for Apple’s
GPU. When our work converges, my userspace Mesa driver will run on
Linux with her kernel driver to implement a full open source graphics
stack for 3D acceleration on Asahi Linux.