<script src="https://km.support.apple.com/static_resources/js/header.js" type="text/javascript" charset="utf-8"></script> Open Menu Close Menu Apple Shopping Bag Apple Mac iPad iPhone Watch TV Music Support Search support.apple.com Shopping Bag Your Mac takes full advantage of each display that you've connected to it. Learn how to extend your work to an additional display. You can set up an additional display with your Mac in several ways. You can connect a display in addition to the built-in display on your Mac. If your Mac doesn't have a built-in display, you can add a display to the first one you connected. You can also set up a wireless connection to your HDTV to make it work as a display. When you connect an additional display, you can: Set up an extended...