Setup the target as follows: Architectures = Standard Architectures (Apple Silicon, Intel) Build Active Architecture Only = No When you display $ARCHS using the Run Script added at the end of Build Phases, you will see the following differences: from GUI(Xcode.app) ARCHS=arm64 from CUI(xcodebuild) ARCHS=arm64 x86_64 Even when built from the GUI, it should be the same as when built from the CUI.

I have a test application that draws a large number of simple textured polygons (sprites). Setting CAMetalLayer's displaySyncEnabled to FALSE will cause load on InterruptEventSourceBridge thread in kernel_task. (In this case, nanosleep is used to adjust the amount of METAL commands per unit time so that they are approximately the same) This appears to be a drawing-related thread, but there is no overhead when displaySyncEnabled is TRUE. What are these differences? A specific application is the SDL test program, SDL/test/testsprite.c. https://github.com/libsdl-org/SDL/issues/10475

I have a test application that draws a large number of simple textured polygons (sprites). Setting CAMetalLayer's displaySyncEnabled to FALSE will cause load on InterruptEventSourceBridge thread in kernel_task. In this case, nanosleep() is used to adjust the amount of METAL commands per unit time so that they are approximately the same. This appears to be a drawing-related thread, but there is no overhead when displaySyncEnabled is TRUE. What are these differences? A specific application is the SDL test program, SDL/test/testsprite.c. https://github.com/libsdl-org/SDL/issues/10475