MacBook – How to stop the brightness of MacBook Air Display from fluctuating

displaymacbook pro

The brightness of display of my MacBook Air is fluctuating. It is getting black and bright continuously. I don't know what to do or how to resolve the issue.

Best Answer

The first thing I would try is to disable auto brightness: System Preferences → Displays → uncheck Automatically adjust brightness.

If that doesn't work (or if it does and you still want auto brightness), try resetting the SMC (System Management Controller) — the SMC controls many hardware features of the Mac and resetting it can fix such problems.

Lights

  • The display backlight doesn't respond correctly to ambient light changes on Mac computers that have this feature.

Source: https://support.apple.com/kb/HT201295

  1. Shut down the computer and connect the power adapter.

  2. Press ⇧⌃⌥ and the power button, then release them all at the same time.

    The Mac shouldn't boot and will remain off. The LED on the MagSafe connector may change colour and/or flash briefly.

  3. With the charger still connected, press the power button to turn your Mac back on.

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