SceneKit scene higher than expected FPS on macOS

Question

My macOS app has two SceneKit sceneViews, and when they're empty, they both appear to be running at an FPS of 120.

I've not manually set preferredFramesPerSecond anywhere in my code. The default for preferredFramesPerSecond is 60 FPS, so I'm a bit confused as to why the FPS is double than that - anyone have any thoughts?

Answer 1

The online documentation seems to be out-of-date. Here's what you can find in the header documentation for SCNView.h:

The default value is 0 which means the display link will fire at the native cadence of the display hardware.