Set Up Dual Monitors on a Mac

Created by Antonio Contreras, Modified on Thu, 12 Jan, 2023 at 4:19 PM by Antonio Contreras

Click the Apple menu icon.
Click System Preferences.
Click Displays.
On your main display, click Arrangement.
If the mirror displays box is checked, both monitors will show the same image at all times.
On your main display, make sure the mirror displays box is unchecked.
On your main display, you’ll see a diagram showing the positioning of your displays. If they’re not positioned correctly, locate the secondary monitor icon.
If you're satisfied with the monitor positioning, you can skip to step 12.
Click and drag the secondary monitor into the correct position.
Release your mouse or trackpad, and the secondary monitor will drop into the position you chose.
Your monitors are now ready to use, but you may need to configure the new monitor. Make sure the image doesn't look stretched, squashed, discolored, or anything. If it doesn't look right, click Scaled.
Click the correct resolution for your display.
If your second display looks right, you can close the display settings and start using your Mac.