How to use MacBook clamshell mode

What if I told you can still use your Mac with the lid closed? Clamshell mode lets you connect to an external display, turning your laptop into a desktop workstation. This feature is perfect for working around a faulty screen or simply reducing visual clutter on your desk. Here’s everything you need to know about setting up and using clamshell mode on your Mac.

What is clamshell mode on Mac?

Many Mac users know they can connect their MacBook to an external display for better graphics. This is helpful for gaming, photo editing, and other visual tasks. You can also use an external monitor while your MacBook's lid is closed. This feature is called clamshell mode.

Clamshell mode lets you use an external monitor without having your MacBook's smaller screen in the way. This is especially useful if your MacBook's display is not working. Just plug in your MacBook and connect it to an external monitor. You will see your documents, photos, and web browser on the new screen, and you can close your laptop's lid while you work.

Things to know before setting up clamshell mode

With clamshell mode, you can transform your MacBook into a desktop-like setup. Here are some additional advantages:

• Using clamshell mode with an external display is the best way to improve the graphics performance while minimizing your MacBook’s resources. 

• If your monitor is set up correctly, clamshell mode can offer better ergonomics than using a laptop for graphic-heavy work. 

• Another benefit of clamshell mode is that you can use the mouse and keyboard of your choice, making for a more comfortable user experience. 

The main concern with clamshell mode is cooling. With the MacBook closed, the natural cooling through the keyboard is reduced, which may lead to overheating.

MacBook Airs are more susceptible to overheating in clamshell mode compared to MacBook Pros. To offset this, use a MacBook cooling stand while in clamshell mode and take a break if your laptop gets too hot.

What do you need to use a MacBook in clamshell mode

To make the most of the clamshell mode and use this mode effectively, you’ll need a couple of things:

• An AC Adapter to power your MacBook

• An external mouse and keyboard

• A supported monitor 

• An HDMI/VGA to USB-C adapter (essential for MacBooks with only USB-C ports to connect to external displays)

When you’ve ready, follow the steps below to set up clamshell mode. 

How to use clamshell mode on your MacBook

Before you get started using your MacBook as a desktop computer, you will need a wireless mouse, keyboard, and external monitor. Newer MacBooks (with USB-C ports) will require an HDMI/VGA to USB-C adapter to connect to an external display. 

Once you have all the equipment you need, follow these steps to enter clamshell mode on your MacBook:

1. Plug in your external monitor and your MacBook into a power outlet.

2. Connect your external monitor to your MacBook with an HDMI cable and possibly a VGA/HDMI to USB-C adapter. 

3. Turn on the external monitor.

4. Open your MacBook, go to the Apple menu > System Settings > Displays.

5. Select your external monitor. You can also adjust any color and brightness settings here. 

6. Make sure Bluetooth is turned on and connect your mouse and keyboard. If you are using external speakers, connect them too.

Update the power settings:

1. In System Settings, go to Battery and click Options.

2. Turn on "Prevent automatic sleeping on power adapter when the display is turned off."

3. Now go to Lock Screen.

4. Set the time for "Turn display off on power adapter when inactive" to Never.

You should be ready to close the lid to your MacBook and enter clamshell mode, but you might want to test out your settings before closing the lid by using Screen Mirroring. 

1. Click on the Control Center icon in the upper right corner of your screen. 

2. Click Screen Mirroring and click Mirror Built-In Display.

You should get a good idea of exactly how clamshell mode will work on your external monitor with Screen Mirroring. Once you are satisfied with the settings, close the lid and get to work. 

Did you know? System Settings is virtually the most important app on your Mac because it is where you customize your user experience. To learn how to use it, check out this handy guide.

Improve your Mac’s performance with CleanMyMac

To keep your Mac running efficiently, it's essential to perform regular maintenance to free up space, scan for malware, and optimize speed. CleanMyMac thoroughly scans your hard drive and provides effective solutions based on what it finds. The best part is that it works effortlessly behind the scenes, letting you enjoy a fully optimized MacBook without any extra effort on your part.

Here’s how to use this smart helper: 

1. Get your free CleanMyMac trial.

2. Within the Smart Care module, click Scan.

3. Once the scan is complete, click Run to remove junk and perform Mac maintenance.

Tip: For smooth data transfers, consider using target disk mode, which transforms your Mac into an external drive. Check out this article for more details on how to use target disk mode.

Tips for making the most of clamshell mode on your MacBook

We’ve covered the essentials of using your MacBook with the lid closed, but here are some additional tips to ensure smooth performance.

• Clamshell mode requires your MacBook to remain plugged while in use, which may impact battery longevity. To help maintain your battery's health, consider adjusting your battery settings.

• Keep in mind that disconnecting your MacBook from power will automatically exit clamshell mode. To activate the clamshell mode after unplugging, simply reconnect your MacBook to power and wake it up by clicking or moving your mouse.

• If you're just watching a movie, you might not need to connect additional Bluetooth accessories, which can simplify your setup.

• With the MacBook closed, ensure it's placed in a well-ventilated area or consider using a cooling pad if you're running resource-intensive apps.