How to Fix Mac Screen Flickering When Charging

Experiencing a flickering screen on your Mac can be both distracting and concerning, especially when it coincides with charging. This issue may stem from a variety of hardware or software problems, ranging from loose connections to outdated drivers. If your Mac’s display flickers whenever you connect it to power, don’t worry—there are several practical troubleshooting steps you can take to resolve the problem and restore smooth operation. In this guide, we’ll walk you through the most effective methods to fix Mac screen flickering when charging.

How to Fix Mac Screen Flickering When Charging

Identify the Cause of Flickering

Before diving into solutions, it’s essential to determine what might be causing the flickering. Common causes include hardware issues, software conflicts, or power-related problems.

• Hardware issues: Loose or damaged display cables, faulty charging port, or battery problems.
• Software conflicts: Outdated macOS, incompatible applications, or display driver issues.
• Power source problems: Fluctuating or incompatible power adapters, faulty outlets, or electrical interference.

Assessing the situation can help you choose the most appropriate fix. For example, if flickering only occurs when using a specific charger or in certain locations, the problem might be power-related. If it persists regardless of the power source, hardware or software issues are more likely.

Basic Troubleshooting Steps

Start with simple checks to eliminate common causes before moving on to more complex fixes.

• Check your power adapter and cable: Inspect for visible damage, fraying, or bent connectors. Use a different charger if available to see if the problem persists.
• Test different power outlets: Plug your Mac into a different socket to rule out electrical issues. Avoid extension cords or power strips that might cause fluctuations.
• Reset the SMC (System Management Controller): This can resolve power and hardware-related issues.
• Reset the NVRAM/PRAM: This resets certain settings and can fix display problems.
• Update macOS: Keeping your system updated ensures compatibility and bug fixes that might resolve flickering issues.

How to Reset the SMC on Your Mac

The SMC controls many hardware functions, including power management and display behavior. Resetting it can often fix screen flickering related to charging issues.

• For MacBooks with T2 Security Chip (2018 and later models):
  1. Shut down your Mac.
  2. Press and hold the power button for 10 seconds, then release.
  3. Wait a few seconds, then press the power button again to turn on your Mac.
• For MacBooks without T2 chip:
  1. Shut down your Mac.
  2. Press and hold Shift + Control + Option (Alt) on the left side of the keyboard and the power button simultaneously.
  3. Hold for 10 seconds, then release all keys.
  4. Press the power button to turn on your Mac.

Resetting the NVRAM/PRAM

NVRAM (Non-Volatile Random-Access Memory) or PRAM (Parameter RAM) stores system settings that can sometimes cause display issues if corrupted. Resetting these can help resolve flickering when charging.

1. Shut down your Mac.
2. Turn it on and immediately press and hold Option + Command + P + R.
3. Hold these keys for about 20 seconds, during which your Mac may restart.
4. Release the keys and let your Mac boot normally.

Update macOS and Display Drivers

Outdated software can cause display glitches. Ensure your Mac is running the latest version of macOS.

• Click on the Apple menu and select System Preferences.
• Choose Software Update.
• If updates are available, follow the prompts to install them.

Updating your system can resolve bugs that lead to screen flickering, especially related to display drivers or graphics hardware.

Check for Software Conflicts and Display Settings

Sometimes, third-party applications or incorrect display settings can cause flickering issues.

• Boot your Mac into Safe Mode to disable third-party extensions and login items:

1. Shut down your Mac.
2. Turn it on and immediately press and hold the Shift key.
3. Release the Shift key once the login window appears.

If flickering stops in Safe Mode, the issue is likely caused by third-party software. You can then try removing recent apps or updates.

• Reset display settings to default:

1. Go to System Preferences > Displays.
2. Adjust resolution and refresh rate settings to defaults or recommended options.

Inspect Hardware Components

If software solutions do not fix the flickering, hardware inspection is necessary.

• Check the display connection: For MacBooks, this usually requires professional service due to internal design.
• Test with an external monitor: Connect your Mac to an external display. If the external screen flickers too, the issue might be with the graphics hardware or software.
• Battery health: A failing battery can cause power fluctuations leading to flickering. Check battery status via System Information > Power.

If hardware issues are suspected, it’s advisable to consult an authorized service provider or Apple Store for repairs.

Additional Tips for Preventing Screen Flickering

• Use genuine or certified charging cables and adapters to ensure consistent power delivery.
• Avoid charging your Mac in areas with electrical interference or unstable outlets.
• Keep your Mac’s software and firmware up to date for optimal compatibility and bug fixes.
• Regularly clean your Mac’s ports and connectors to prevent dust or debris from causing poor connections.
• Monitor your Mac’s battery health and replace aging batteries to prevent power fluctuations.

When to Seek Professional Help

If you’ve tried all the above steps and your Mac’s screen still flickers when charging, it may be time to seek professional assistance. Persistent flickering could indicate hardware failures such as a damaged display, faulty graphics card, or internal wiring issues. Visiting an authorized Apple service center can help diagnose and repair the problem effectively.

Summary of Key Points

Screen flickering on your Mac during charging can be caused by hardware, software, or power-related issues. To troubleshoot effectively:

• Inspect and replace faulty charging accessories.
• Reset SMC and NVRAM/PRAM to resolve power and display settings.
• Update macOS and display drivers for compatibility and bug fixes.
• Boot into Safe Mode to identify software conflicts.
• Check hardware components, including display connections and battery health.
• Use certified accessories and avoid electrical interference to prevent future flickering.

If these steps do not resolve the issue, consider consulting a professional technician or visiting an Apple service center to diagnose potential hardware failures. Addressing screen flickering promptly can help protect your device and ensure a smooth user experience.