How to Close Your MacBook with an External Monitor

If you have an external monitor connected to your MacBook, you may want to close your MacBook without disconnecting the monitor. This can be useful if you want to keep working on the same project on both screens, or if you’re giving a presentation and want to keep your MacBook closed to avoid distractions. Here’s how to do it:

  1. Make sure your external monitor is turned on and connected to your MacBook.
  2. Open System Preferences and go to the Displays preference pane.
  3. Click the Arrangement tab.
  4. Check the “Mirror Displays” box.
  5. Close your MacBook lid.

Your MacBook will enter what’s called “clamshell mode,” and the external monitor will become your primary display. You can now work with your MacBook lid closed, and all your applications and windows will stay open on the external monitor. When you’re done, just open the lid and your MacBook will switch back to using its built-in display.

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