It's true, but for most applications, games consoles are not even a consideration. There's a mountain of programs that only target Windows, Linux, macOS, Android, and iOS or some subset thereof.

Doesn't change the fact that OpenGL was never available in all platforms, regardless how often one spreads that urban myth.

Even on Mac OS it wasn't available, rather Quickdraw 3D was the API to go to.

Had Apple been successful with their in house OS, and surely they wouldn't have cared about OpenGL.

Are you saying OpenGL wasn't on Mac OS before Mac OS X? That's not true. Apple released OpenGL for Mac OS 9 in 1999.

WWDC 1999: Mac OS 9 - A work in progress https://youtu.be/LkmSrCsKPLk?t=1360

WWDC 1999 was after NeXT's acquisition, the engine was already rolling, adopting NeXTSTEP features.

Also note that Copland did not have any OpenGL support planned.