How do I make my MacBook Pro only show external monitor?

This is how I achieve this.

1. Connect You MacBook with the power cable (charger).
2. Connect with external Keyboard + mouse.
3. Turn the MacBook lid down.
4. Now click keyboard buttons.
5. Now you are using only your external display, your cursor will not go into your other display. There is only one display now.

How do I stop my Mac from dual screen mirroring?

Mac:

1. Open System Preferences.
2. Select Displays.
3. Select Arrangement.
4. Uncheck Mirror Displays.

How do I change the video output on my Mac?

Choose Apple menu > System Preferences, then click Sound. In the Output pane, make sure that your HDMI device is selected. If you’re connecting using a Mini DisplayPort adapter, make sure that your Mac can send audio over Mini DisplayPort.

Can I close my Mac and use an external monitor?

Connect your display If you use an external keyboard and mouse with your Mac notebook, you can close the built-in display after you connect your external display. If your external display doesn’t turn on after you connect it to your Mac, connect your display while your Mac is off, then wake or turn on your Mac.

Can you close your MacBook while using a monitor?

Enabling Clamshell mode allows you to close the lid of your computer while its connected to an external display, without putting your computer to sleep.

Why are my two external monitors mirroring each other Mac?

The problem is that the dock you’re using is not supported on macOS for a 3-display configuration. In practice, the HP Thunderbolt docks require MST-support for multiple displays from the system before they can enable 3 separate displays connected to the dock.

How do you change the display on a Mac?

To arrange your displays:

1. Choose Apple menu  > System Preferences, then click Displays.
2. Click the Arrangement tab.
3. To change the position of a display, drag it to the desired position.
4. To set a different display as the primary display, drag the menu bar to the other display.

How do I stop my MacBook from sleeping when I close the lid Catalina?

Enabling Clamshell mode allows you to close the lid of your computer while its connected to an external display, without putting your computer to sleep.

1. Click the Apple menu, select “System Preferences,” and then choose “Energy Saver.”
2. Set the Computer Sleep and Display Sleep sliders to “Never.”