Base MacBook Air and MacBook Pro systems with M3 chips can natively host two external displays in clamshell mode when running macOS Sonoma 14.3 or 14.6 respectively. Connect your external displays, a power source, and an external keyboard and mouse, then close the laptop lid to switch to this mode. Plugable Thunderbolt docks can also be used to expand connectivity with dual displays, USB ports, audio, and ethernet without requiring additional software.

Requirements

Before getting started, ensure you have the following:

• MacBook Air or MacBook Pro with an Apple M3 chip.
• macOS Sonoma 14.3 or later for an M3 MacBook Air or macOS Sonoma 14.6 or later for an M3 MacBook Pro.
• Two external displays with compatible video inputs (e.g., HDMI, DisplayPort, USB-C).
  • A dock or graphics adapter can be used as well.
• External keyboard and mouse (wired or wireless).
• Power adapter or power source for your MacBook
  • A docking station that provides adequate charge can be used in place of the native power adapter, be sure to check the wattage your dock provides.

How to Set Up Dual External Displays With the Lid Closed

1. Set Up Your External Keyboard and Mouse
   1. If you’re using a wired keyboard and mouse, connect them directly to your MacBook or Plugable dock.
   2. For wireless peripherals, ensure they are paired with your MacBook and functioning properly.
       
2. Ensure the MacBook is charging from an external power source to prevent it from entering sleep mode.
   1. A docking station that provides adequate charge can be used in place of the native power adapter, be sure to check the wattage your dock provides.
       
3. Connect your displays through the Plugable dock using the appropriate cable (e.g., HDMI, DisplayPort, USB-C, etc.)
    
4. Ensure both displays are powered on and set to the correct input source.
    
5. Enable "Clamshell Mode" (Lid Closed Mode)
   1. With your external displays connected and set up, close the lid of your MacBook.
   2. Your MacBook will automatically switch to "Clamshell Mode," where the internal display turns off, and the external displays become your primary screens.
       
6. Configure Display Settings
   1. Open System Settings on your MacBook.
   2. Go to Displays.
   3. You should see both external displays listed. Arrange them according to your preference by dragging the display icons.
   4. Adjust the resolution, refresh rate, and other settings as needed.

5. Check the Display Arrangement

• With the lid closed, check that the external displays are functioning as expected.
• If necessary, re-open the Displays settings to adjust the arrangement, resolution, or other preferences.

Troubleshooting Tips

• No Display on External Monitors: If the external displays are not showing anything, open the lid of your MacBook and check the connections.
• MacBook Sleeps When Lid Is Closed: Make sure your MacBook is connected to a power adapter. Clamshell Mode requires the MacBook to be plugged into an external power source.
• Performance Issues: If you experience lag or performance drops, try lowering the resolution or refresh rate of the external displays.

Applicable To

• Plugable Thunderbolt Docking Stations