How to Use Two Screens on a Mac
It is generally easy to set up a second monitor when using an Apple iMac. There are, however, certain differences depending on the type of iMac you have.
For Mac computers with Apple Silicon, you can only connect one single external monitor. iMacs that have Thunderbolt 3 (USB-C) allow you to connect a single monitor to each port. Finally, Mac devices with Mini DisplayPorts, Thunderbolt, or Thunderbolt 2 enable you to connect up to two further displays.
You can set up your monitors as an extended desktop, stretching your display across both screens. Begin by connecting the monitor to your Mac using the appropriate cables and necessary adapter. Then, follow these steps:
- Go to Apple Menu > System Preferences.
- Click Displays then go to Arrangement.
- Ensure Mirror Displays is unchecked.
- You will see a diagram showing the position of your displays. To change them, simply drag and drop the secondary monitor into the correct position.
- Close the display settings and use your Mac as normal.
If you would like to duplicate your screen onto the second monitor, simply check the Mirror Displays box.
It is also important to check you are happy with the resolution of your second screen. Make sure the display does not look stretched or squashed. If it does, click the Scaled option and select the correct resolution for your monitor.