Your macOS PCs are made up of retina displays and this gives a crisp look to your screen when you’re trying to watch content on your Mac or read text. Mac screens have a high resolution which gives your display sharpness and allows you to see color is great depths.
Usually, your display doesn’t have any problems during the lifetime of your Mac, but when there is a problem with your display, your Mac screen can start flickering. When your screen starts flickering, the display constantly goes dim and lights quickly or your screen turns off and on quickly. Since there’s no way to find the source of the flickering, troubleshooting this problem can be quite hard.
The Reason your Mac Screen Flickers
The reason your Mac screen is flickering is that there’s a problem between the hardware and software of your screen that allows your screen to function. The software on your mac controls certain hardware and in this case, the flickering issue can’t be fixed by troubleshooting the software that’s responsible for your Macs screen.
1. Put Mac in Safe Mode
The first thing you need to do to troubleshoot the flicker problem is by starting your Mac up from Safe Mode. Safe Mode starts up your Mac in a troubleshooting mode so that it can perform checks and prevent other software from loading up. This can stop the flickering issue on your Mac.
To put your Mac in Safe Mode:
1. Restart your Mac.
2. Once it starts to turn on, hold the Shift key.
3. Let go once you see the Apple logo. This enters your mac to in safe mode.
4. Login with your password. Your screen should no longer flicker from this point onwards.
2. Reset NVRAM
The NVRAM is a non-volatile small memory that your Mac uses to store some settings so that you can access then more quickly. RAM store these setting so that when you try and access them, they load up quicker, but as soon as it’s reset, these setting will take longer to load. Resetting the NVRAM can fix the flickering issue within your Mac.
To Reset NVRAM:
1. Shut down your Mac. Locate Hold Command (⌘), Option, P, and R without pressing them.
2. Turn your Mac on.
3. Hold the Command–Option–P–Rkeys when you hear the bootup sound.
4. Hold the keys until your Mac restarts. Check if your screen is still flickering.
3. Automatic Graphic Switching
The automatic graphic switching on your Mac allows it to automatically switch to the best graphics system for applications running on your Mac. If your Mac is continuously switching graphic systems while you’re running applications, it can cause your screen to flicker.
To enable automatic graphic switching:
1. Go to System Settings.
2. Select Energy Savings.
3. Uncheck Automatic Graphics Switching. Check if your Mac’s screen is still flickering.
4. Default for Display
If you’re using the wrong resolution for your Mac, it can cause the screen to flicker. If you have bad eyesight, you may have used a higher frequency.
To set your display to default:
1. Go to System Preferences. You can find this in the Apple Menu.
2. Select Display in the list of options.
3. Select Default for Display. This is going to change your display size and, in the process, stop your Mac screen flickering.
5. Reset SMC
There’s an integrated chip on your Macs login board and it’s responsive for the power management. The SMC is known to start a lot of problems so resetting it can help fix the flickering problem your Mac is experiencing.
To reset the SMC:
1. Shut down your mac.
2. Connect it to the charger.
3. Hold the Shift+ Control+ Option+ Power button keys together for 5 seconds.
4. Release the key.
5. Wait for your Mac to boot up. Wait your mac boots up, your display should no longer flicker.