Application.targetFramerate not working on mac

Hello, I'm currently working on a FPS game and i would like to add a feature where you can modify your maximum framerate. But I'm having trouble with it. I used very basic piece of code which is:

 Application.targetFramerate = 30;

When I play it on windows PC, this feature works perfectly, but on mac, it does not work at all. I make sure that VSync is turned off.