Menu extras in OS X are small menu bar additions that appear on the far right of the system menu; they include a number of built-in controls such as the volume, Wi-Fi, and date and time menus. Third-party developers can also create their own menu extras. I've written about managing menu bar additions before -- usually you can just hold the Command key and drag the menu extra off the menu bar to remove it. But sometimes, depending on the development method used to create it, the menu extra won't allow you to disable or delete it.
These … Read more