Dual Monitors

Can be used to connect classroom projector

Use external monitors with your Mac

Turn on extended desktop mode

Make sure that your external display is turned on and connected to your Mac.
Choose Apple menu > System Preferences, then click Displays.
Click the Arrangement tab.
Make sure that the Mirror Displays checkbox isn’t selected.

Arrange your displays or change your primary display

So that you can move apps and windows across your displays in one continuous motion, arrange your displays to match the setup on your desk. You can also change your primary display, which is where your desktop icons and app windows first appear.

Choose Apple menu > System Preferences, then click Displays.
Click the Arrangement tab.
To change the position of a display, drag it to the desired position. A red border appears around the display as it's moved.
To set a different display as the primary display, drag the menu bar to the other display.

Use video mirroring

With video mirroring, all of your displays show the same apps and windows. This is how our computers are usually setup in a normal classroom.

Turn on video mirroring

Make sure that your external display is turned on and connected to your Mac.
Choose Apple menu > System Preferences, click Displays, then click the Arrangement tab.
Make sure that the Mirror Displays checkbox is selected.

Use AirPlay

With Apple TV, you can mirror the entire display of your Mac to your TV, or use your TV as a separate display. To turn on AirPlay, follow these steps:

Make sure that your TV is turned on.
Choose in the menu bar, then choose your Apple TV. If an AirPlay passcode appears on your TV screen, enter the passcode on your Mac.
Mirror your display or use your TV as a separate display:
- To mirror your display, choose , then choose Mirror Built-in Display.
- To use your TV as a separate display, choose , then choose Use As Separate Display.
To turn off AirPlay, choose , then choose Turn AirPlay Off.

If you don't see in the menu bar, choose Apple menu > System Preferences, click Displays, then select the "Show mirroring options in the menu bar when available" checkbox.

Learn more about how to AirPlay video from your Mac.

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