Note: This may not work on older Mac devices such as early 2015 models or older.
Click Apple menu > System Preferences > Display > Arrangement. Extended mode – uses the external display to extend the image displayed on your main Mac device. Extended mode versus mirror modeĬonnecting to an external display lets you choose between: This is for a MacBook Air (13-inch, early 2015). 
Dual display and video mirroring: Simultaneously supports full native resolution on the built-in display and up to 3840 by 2160 pixels on an external display, both at millions of colors. Under Graphics and Video Support, you will see some details similar to the following : You will then be directed to an Apple web page indicating your device’s technical specifications. Click the Apple Menu (located on the left-hand side of the screen). 
Here’s how to use external monitors as a second display for your Mac computers.įirst, check what displays your Mac device supports by doing the following:
If you’re using a Mac Mini, Macbook Pro, or Macbook Air, you probably think your external monitor options are limited. Using two monitors doesn’t just make working convenient, but it also makes you more productive.
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