MacVsPc!! ?

Compiled a standalone, in VS2010 Windows 7 i7 and get% 1 or 0% CPU. (Release 32 or 64) * Same project, "El Capitan" using the latest version of Xcode (10.5 codebase) I get 50% of CPU. Any ideas?

Is standalone minimized on MAC? There is a bug in Mac standalone that will mess the CPU usage when you minimize it...

If you use member variables of the double type, then they need to be aligned on Mac. However, I don't think that would account for such a huge difference...

Yes Youlean!! It's just that, now do not understand why it happens , or if no way to fix it. I use a background image, Dials , etc ..

Could be a denormal problem in your audio processing code, that can cause spikes larger than no optimisation, and show up on one platform/machine but not the other. Also, make sure you don't have controls un-intentionally re-drawing too often.