Comment by ryandrake

Sad but not surprising. Apple marked their OpenGL subsystem as deprecated all the way back in 2018 with macOS 10.14 Mojave and iOS 12. By some miracle it has kept working all that time. While I hate it that Apple can just up and declare a widely used cross-platform API 'deprecated,' it's their system, not ours. So, we should not expect them to care or lift a finger if they accidentally break it.