If you’re coming from Microsoft Windows and start using a Mac you probably expect the green button to maximize your window. However, the maximize button behaves differently on Mac. When you hit the green button it widens your window just enough to the point where all your content fits horizontally. So you can still see your desktop or other programs in the background. There is, of course, the full screen button that will have your program overlap the toolbar on the top. Unfortunately, not all programs have the fullscreen button. Also, if you’re used to Microsoft Windows you may prefer to just have your program maximize by taking up the entire desktop area but still leave you with the toolbar on the top. Thankfully, there is a way to do that.
By downloading an application called RightZoom it will automatically have the green button on the top left of all your applications maximize the way it does on Windows; by taking up your whole desktop without hiding the toolbar on the top.