That's true, but I'm sorry, telling them to test it themselves every time a new release comes out because "I can't comment on known issues or on whether or when a fix might ship" is just stupid. It's a liability-reducing strategy benefiting only Apple, not a nice way to treat customers.
Also, not having a regression test that catches OpenGL being completely broken on many common hardware configurations seems pretty bad. Yes, OpenGL on macOS is deprecated, but guess what, deprecating it was also stupid. It was a legal decision made by Apple lawyers pursuing a particular litigation strategy vs Nvidia that caused Apple's withdrawal from Khronos group. It wasn't a sound technical decision.
Both of these things make it seem like the lawyers are in charge at Apple rather than the engineers.
Also, not having a regression test that catches OpenGL being completely broken on many common hardware configurations seems pretty bad. Yes, OpenGL on macOS is deprecated, but guess what, deprecating it was also stupid. It was a legal decision made by Apple lawyers pursuing a particular litigation strategy vs Nvidia that caused Apple's withdrawal from Khronos group. It wasn't a sound technical decision.
Both of these things make it seem like the lawyers are in charge at Apple rather than the engineers.