How to Turn On a Mac Keyboard Backlight

Eric DawsonByEric Dawson Computers & Software

For how to turn light on mac keyboard, press F6 or the Increase Keyboard Brightness key on older Mac models with keyboard-brightness keys. Press the control again to raise the backlight level. A powered-on Mac does not always have its keyboard light enabled, since the feature can be turned off manually or respond automatically to ambient light.

You can also adjust keyboard-backlight behavior in System Settings under Keyboard settings, including automatic adjustment and automatic shutoff after inactivity. Backlit keyboards are built into MacBooks and some iMac models, but the feature is not included on every Mac.

How to Turn Light on Mac Keyboard with Brightness Controls

On older Mac models, the increase-brightness control is usually F6, and repeated presses can raise the backlight level.

Because Apple has changed function-key assignments over time, the exact key is not identical on every Mac. Dedicated keyboard-brightness controls appeared on function-key rows from 2011 through 2020, while more recent layouts assign other functions to those keys. A Mac keyboard backlight shortcut therefore depends on the keyboard and model in front of you, rather than a single rule that applies across every Mac generation.

Try the Keyboard Brightness Control

Follow these steps when your Mac keyboard has an available keyboard-brightness control:

  1. Find the F6 key or a key marked for increasing keyboard brightness.
  2. On newer models, use the appropriate control.
  3. Press the relevant key once to turn on or increase the keyboard light.
  4. Raise the brightness further with additional presses if the keys remain difficult to see.

Current MacBook Air models in both 13-inch and 15-inch sizes list a backlit Magic Keyboard, 12 full-height function keys, and an ambient light sensor. Apple also lists a backlit Magic Keyboard, 12 full-height function keys, and an ambient light sensor for current 14-inch MacBook Pro models. Hardware support for a backlit keyboard does not mean the F5 and F6 labels will work in the same way across every current or older Mac.

For people trying to adjust keyboard brightness on Mac, begin with the labeled brightness control rather than assuming that a powered-on computer has its backlight enabled. Check the key markings carefully, since compact MacBook keyboards use F1 through F12 while full-size Apple desktop keyboards can include additional function keys. If pressing F5 or F6 changes another function instead of the keyboard light, use the key specifically labeled for keyboard brightness when available.

Find Keyboard Backlight Settings on Mac

Start in System Settings and open Keyboard settings to find the controls for a Mac keyboard backlight. From there, manage automatic behavior tied to surrounding light and options affecting illumination after the Mac is idle.

Ambient light means the light in your surroundings, which the Mac can use as a cue for keyboard illumination when automatic behavior is enabled.

Automatic controls can also work with the Mac’s inactivity behavior. After a period without use, the keyboard backlight may turn off automatically, so a dark keyboard does not by itself show that the backlight has failed. Rather than treating keyboard illumination as a permanent on-state, use the Keyboard settings area to decide how much automation suits the place where you work. For keyboard backlight settings Mac searches, start with System Settings and Keyboard settings when room lighting changes.

Settings can complement the keyboard brightness controls without making every Mac keyboard identical. Apple’s function-key assignments have changed across generations, and compact Magic Keyboards and MacBooks use F1 through F12. Between 2011 and 2020, listed function-key assignments included keyboard-backlight controls; from 2020 onward, the listed assignments include Spotlight, Dictation, and Focus-related functions. That history is why the Keyboard settings area matters when you want to adjust keyboard brightness Mac behavior beyond a single key press.

Before assuming a mac keyboard backlight not working issue, check the setting that governs automatic adjustment and consider the ambient light around the Mac. Backlit keyboard hardware appears on current MacBook Air and 14-inch MacBook Pro specifications, while the wider Mac range has changed over time. Reviewing those controls separates an automatic response from a preference and keeps the next step focused on the keyboard your Mac has.

Use Keyboard Brightness Keys and Shortcuts

Press the key marked for increasing keyboard brightness to raise or switch on the illumination. On Macs where that control is assigned to F6, pressing F6 is the direct Mac keyboard backlight shortcut. Check the printed icon and your model’s key layout.

If its special functions are active, that control changes the light’s level. A key with no keyboard-brightness assignment will not provide that adjustment.

Why F5 and F6 Can Differ

Function assignments have changed across Apple laptop and compact keyboard generations. Earlier keyboard generations used dedicated keyboard-backlight controls. By contrast, the 2020-present set includes Spotlight, Dictation, and Do Not Disturb in Big Sur or Focus from Monterey. That historical shift means F5 and F6 are useful starting points, not an assurance that every current Mac uses them for backlight adjustment.

Consequently, physical labels are the practical guide when you need to adjust keyboard brightness on Mac. Some compact Magic Keyboards and MacBooks have F1 through F12, while full-size desktop keyboards with numeric keypads can extend to F15, F16, or F19. Where a function key’s normal function differs from its special function, the fn key can toggle between default and special function use. Using the labeled keyboard-brightness control after that toggle is more reliable than assuming a fixed shortcut.

Remember that a powered-on Mac can have its keyboard illumination disabled manually or automatically, so a press may be needed before judging the control. That distinction can help when a “mac keyboard backlight not working” search begins with a keyboard that simply is not lit. Checking the keys’ printed assignments first keeps the process tied to the keyboard in front of you.

Why a Mac Keyboard Backlight Turns Off

Ambient light is one reason the illumination may change without a direct command. When automatic behavior is enabled in System Settings under Keyboard settings, the backlight can turn on or adjust according to surrounding light conditions. That means a change in the room can affect keyboard lighting even while the Mac remains in use.

Those models include both features. Both behaviors are described separately: one responds to ambient-light conditions, while the other can turn off the backlight after inactivity.

Inactivity is another automatic trigger. After a period without use, the keyboard backlight may switch off automatically. No supplied timing applies to that delay, so a light that disappears after the Mac sits unused can reflect the configured behavior rather than a permanent fault and can make an active Mac appear to have a Mac keyboard backlight not working issue.

Before treating a dim or dark keyboard as a hardware problem, check keyboard backlight settings in System Settings and consider the room’s light level and recent inactivity. Different models do not share an identical function-key history, but automatic ambient-light and inactivity behavior explains why the backlight may not remain on continuously. Some Mac keyboards lack the feature altogether, so behavior also depends on the specific Mac or keyboard.

Rather than assuming the lighting should stay fixed at one level, expect it to respond when automatic control is active. For supported models, the setting can therefore make the backlight seem intermittent when it is responding to ambient conditions or inactivity rather than indicating a lasting failure.

Which Mac Keyboards Have a Backlight

Those MacBook Air models and the 14-inch MacBook Pro have this hardware.

Built-in keyboard lighting is therefore a documented hardware feature on those current MacBook models, rather than something added through macOS alone. Both MacBook Air sizes use a Magic Keyboard with 78 ANSI keys or 79 ISO keys, 12 full-height function keys, and Touch ID. Each listed Air also includes an ambient light sensor alongside its keyboard and Force Touch trackpad.

Current MacBook Models with Documented Backlit Keyboards

Model Keyboard Hardware Ambient Light Sensor
13-inch MacBook Air Backlit Magic Keyboard, 78 ANSI or 79 ISO keys, 12 full-height function keys, Touch ID Included
15-inch MacBook Air Backlit Magic Keyboard, 78 ANSI or 79 ISO keys, 12 full-height function keys, Touch ID Included
14-inch MacBook Pro Backlit Magic Keyboard, 78 ANSI or 79 ISO keys, 12 full-height function keys, Touch ID Included

For MacBook Air buyers, the documented keyboard hardware is the same across the two current display sizes, even though the 13-inch model has a 13.6-inch display and the 15-inch model has a 15.3-inch display. The current 14-inch MacBook Pro has the same ANSI and ISO key-count options listed for the Air.

Because keyboard layouts and function assignments have changed across Mac generations, a mac keyboard backlight shortcut should not be assumed to work identically on every machine. A later function-key arrangement added controls such as Spotlight, Dictation, Do Not Disturb, and Focus, so the physical key labeling can differ by model and era.

Anyone investigating a keyboard-lighting problem should first establish that their particular Mac includes the hardware. Rather than treating every Mac keyboard as identical, check the built-in keyboard and function-row design for the specific computer in use.

Fix a Mac Keyboard Backlight That Is Not Working

Begin by trying the keyboard brightness control once more to see whether it turns on or adjusts the backlight. On keyboards where those controls apply, press the increase control to see whether the light responds rather than assuming the Mac’s powered-on state means the illumination should already be visible.

Before treating a backlight that does not respond as a hardware issue, check the keyboard options in System Settings under Keyboard settings. Look for the available keyboard-backlight controls and confirm that a manual or automatic setting has not left the brightness at its lowest level. Automatic behavior can adjust the backlight according to ambient-light conditions when enabled, so test the keyboard under different lighting conditions before judging the result.

After checking settings, use the keyboard brightness key again and watch for a change in the keys’ illumination. Because Apple keyboard function assignments have changed over time, F5 and F6 are not established as keyboard-backlight controls on every current Mac. Compare the printed symbols on the function row with the expected keyboard-brightness icon, if one is present, instead of relying only on an F-key number.

Finally, consider whether the keyboard itself supports backlighting before spending time on control checks. Avoid using another Mac’s layout as a guide, since the feature is built into MacBooks and some iMac models but is not available across every Mac model. Keyboard designs and function rows have shifted between generations.

If the light still does not respond after checking the relevant key, Keyboard settings, ambient conditions, and the keyboard’s feature set, keep the observations specific. Record which key was pressed, whether automatic behavior was enabled, and whether the backlight changed in brighter or dimmer surroundings. Then use those details when seeking further Mac support, since they separate a control or settings issue from a question about the keyboard’s built-in capabilities.

Understand Changes Across Mac Models

Function-key layouts vary across Mac generations. Consequently, the key used to adjust keyboard brightness on a Mac depends on its keyboard design and era.

Earlier layouts included keyboard-backlight controls. During that period, compact MacBook and Magic Keyboard layouts used F1 through F12, and the backlight controls formed part of that row. Use the documented brightness key for your model. That guidance describes one arrangement rather than a universal map for every Mac generation.

Beginning in 2020, Apple keyboard layouts changed again. Current layouts are listed with Spotlight, Dictation, Do Not Disturb in Big Sur, and Focus from Monterey among their function-key assignments. These current models share the listed keyboard features.

Rather than assuming that a particular F-number will always control the light, match the symbol or function assigned to your keyboard. Keyboard-backlight settings can also respond to ambient-light conditions when that option is enabled.

Older MacBook generations add variation. For example, the 2015 12-inch MacBook used a Butterfly keyboard, while the May 2020 13-inch MacBook Pro refresh adopted the scissor-mechanism Magic Keyboard and a Escape key. A full-size desktop Apple keyboard can differ, since models with a number pad may extend beyond F12 to F15, F16, or F19.

Mac laptop design has shifted alongside keyboard hardware, ports, and displays since MacBook first appeared in 2006. Apple’s Mac User Guide includes Keyboard Viewer, Keyboard and trackpad, and Keyboard shortcuts sections, which provide context when function-key labels do not match instructions.

Frequently Asked Questions

Which Key Turns on the Keyboard Backlight on a Mac?

Press F6 or the Increase Keyboard Brightness key to turn on a Mac keyboard backlight. On older Mac models, the increase-brightness control is usually F6. Function-key assignments have changed over time, so the key’s icon can be more useful than its number.

Why Is My Mac’s Keyboard Light Not Working?

The keyboard backlight may be disabled manually, set to respond automatically to ambient light, or turned off after inactivity. Not every Mac model includes a backlit keyboard, either. Current MacBook Air and 14-inch MacBook Pro specifications list a backlit Magic Keyboard and ambient light sensor.

Where Are the Keyboard Backlight Settings on Mac?

Keyboard-backlight controls are available in System Settings under Keyboard settings. That area can be used to adjust the backlight and configure its automatic behavior. Apple’s current menu path is Apple menu > System Settings > Keyboard.

Why Does My Mac Keyboard Light Turn off by Itself?

Your Mac can turn the keyboard backlight off automatically after a period of inactivity. Automatic ambient-light behavior can also adjust the backlight according to surrounding lighting conditions when enabled in System Settings. A powered-on Mac does not always keep its keyboard backlight illuminated.

Do All MacBooks Have a Backlit Keyboard?

Keyboard backlighting is built into Mac keyboards on MacBooks and some iMac models, but it is not available on every Mac model. Current models list a backlit Magic Keyboard in their technical specifications. Check the keyboard itself for a brightness control or review the specifications for the particular Mac.

Can I Adjust Keyboard Brightness on Mac?

Yes, use the keyboard brightness controls to adjust the backlight. F6 or the dedicated Increase Keyboard Brightness key turns it on, with F6 serving as the increase control on older models with keyboard-brightness keys. Automatic adjustment based on ambient light can also be configured in System Settings.

A Mac keyboard backlight can make low-light typing easier, but the right control depends on the Mac’s keyboard generation. Check Keyboard settings in System Settings for automatic behavior and adjustment options. Backlighting is not included across every Mac model.

References

Sources read in September 2026.

Eric Dawson

I'm Eric Dawson, and I write The Money Watch from north Columbus, Ohio. Most of what I cover comes from my own life: renting, a 2014 Honda Fit, parking, computers, food and the bills behind all of it. I spent four years in an apartment-property office and eleven on a distributor's operations desk, reading leases and invoices. Where you need real information, I research the maker's or agency's own page and independent sources and report what they publish. I don't give tax, investment, legal or medical advice.