Are you facing the frustrating issue of your MacBook Air turning off immediately after the charger is disconnected? This unexpected shutdown can disrupt your workflow and leave you wondering about the possible causes and solutions. In this article, we will explore the reasons behind this issue and provide you with troubleshooting steps to resolve it.


The MacBook Air, known for its sleek design and portability, is a popular choice among users for both work and personal use. However, some users have encountered a troublesome issue where their MacBook Air unexpectedly turns off when the charger is disconnected. To address this problem, it is essential to understand the power system of the MacBook Air and identify the potential causes behind this behavior.

Understanding the MacBook Air’s power system

The MacBook Air relies on a combination of battery power and an AC adapter to function properly. When the charger is connected, the MacBook Air draws power directly from the adapter, allowing the battery to charge. On the other hand, when the charger is disconnected, the MacBook Air switches to battery power.

Common reasons for MacBook Air turning off when the charger is disconnected

Several factors can contribute to the MacBook Air shutting down when the charger is disconnected. Let’s explore some of the common reasons:

Battery drain

One possible cause is that the MacBook Air’s battery may be depleted, leading to an immediate shutdown upon disconnecting the charger. This scenario often occurs when the battery capacity is critically low.

Faulty battery

A faulty or aging battery can also result in the MacBook Air turning off unexpectedly. Over time, batteries lose their ability to hold a charge, leading to sudden shutdowns when disconnected from a power source.

Power management settings

Certain power management settings on the MacBook Air can cause it to shut down when the charger is disconnected. These settings may be configured to preserve battery life by automatically turning off the MacBook Air to conserve power.

Software issues

Software-related issues, such as incompatible or outdated applications or an outdated operating system, can trigger unexpected shutdowns. These issues may disrupt the MacBook Air’s power management system, leading to undesired behavior.

Troubleshooting steps to resolve the issue

Now that we have a better understanding of the potential causes, let’s explore some troubleshooting steps to resolve the MacBook Air’s issue of turning off when the charger is disconnected:

Check battery health

Start by checking the battery health of your MacBook Air. Open the Apple menu, go to “System Preferences,” select “Battery,” and navigate to the “Battery Health” section. If the battery health indicates “Service,” it may be time to replace the battery. Contact Apple Support or visit an authorized service provider for further assistance.

Reset SMC (System Management Controller)

Resetting the SMC can often help resolve power-related issues. To do this, shut down your MacBook Air, connect the charger, and press and hold the Shift + Control + Option keys along with the power button for about 10 seconds. Release the keys and power button, then start your MacBook Air as usual.

Calibrate the battery

Calibrating the battery can help recalibrate the battery’s power readings and improve its performance. Start by fully charging your MacBook Air while connected to the charger. Then, disconnect the charger and use your MacBook Air until the battery drains completely and it shuts down. Finally, connect the charger again and allow it to charge to 100%.

Update macOS and applications

Keeping your operating system and applications up to date is crucial for optimal performance. Outdated software can cause compatibility issues and unexpected behavior. Check for software updates in the “System Preferences” and “App Store” sections of your MacBook Air, and install any available updates.

Check power management settings

Review the power management settings on your MacBook Air to ensure they are not causing unexpected shutdowns. Go to “System Preferences,” select “Battery,” and examine the settings related to sleep mode, display brightness, and automatic power-off. Adjust these settings as desired to prevent unwanted shutdowns.

Additional tips to prevent MacBook Air from turning off

In addition to the troubleshooting steps mentioned above, here are some extra tips to help prevent your MacBook Air from turning off when the charger is disconnected:

  • Adjust energy-saver settings: Customize the energy-saver settings in “System Preferences” to strike a balance between power conservation and performance.
  • Close unnecessary applications and processes: Closing unnecessary applications and background processes can reduce the strain on your MacBook Air’s resources and battery life.
  • Use the MacBook Air within recommended temperature range: Exposing your MacBook Air to extreme temperatures can affect its performance and battery life. Use it within the recommended temperature range specified by Apple.
  • Avoid extreme battery drain: Regularly charging your MacBook Air and avoiding complete battery discharge can help maintain its battery health and prevent unexpected shutdowns.


Experiencing your MacBook Air turning off when the charger is disconnected can be frustrating, but understanding the underlying causes and following the troubleshooting steps mentioned in this article can help resolve the issue. Remember to check your battery health, reset the SMC, calibrate the battery, update software, and review power management settings. By implementing these solutions and following the additional tips provided, you can prevent unexpected shutdowns and enjoy uninterrupted use of your MacBook Air.