Mac and C# for building games - Mac or Windows?

I have a mac and am planning to use C# on my mac for3D Unity. I'm very new to game development. Does using a mac mean my games will only be valid for the mac? Or does C# mean my game will only be good for a windows environment.

Thanks in advance

You can program in C# on both Mac and Windows, and build your game for both Mac and Windows, no matter on what platform you develop your game.

it does not depend on which mac or windows you can use in both when playing