False state with app.gpuPerformancePreferences.enableGpuPerformance if no GPU available
Function GetEnableGPUPerformance() of interface IGPUPerformancePrefs of GetExecutionContextSession()->QueryWorkspace() returns true in case no GPU or a not supported GPU is installed on your macOS computer.
To reproduce launch InDesign CC 2018 or later with modifier keys command, option, control, and shift pressed and confirm resetting the preferences.
If you now check the setting either with some C++ code, or ExtendScript "app.gpuPerformancePreferences.enableGpuPerformance", in both cases the returned result is true , which is not the expected result.
When you now choose Preferences > GPU Performance the properties are shown deselected and disabled, which is correct. If you now click in "OK", the above function call now correctly returns false. After quitting and restarting InDesign, the preferences still return false, the correct state.
Looks like the preferences are NOT setup on first launch, but use a boolean default value of "true".