OS X supports a number of menu bar additions (known as "menu extras"), which can be convenient to use; however, you may run into problems where placing your mouse over the icons will give no response ...

Menu extras are the small utility menus at the top-right of your screen that give you quick access to some of the system preferences and other central options in OS X, such as options to select Wi-Fi ...

The system menu bar in OS X is usually fully accessible, either by moving your mouse to the top of the screen and clicking on it or by using hotkeys. However, there may be times when that menu bar ...