Mac User Guide
- Welcome
- What’s new in macOS Sequoia
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- Get started with Apple Intelligence
- Use Writing Tools
- Use Apple Intelligence in Mail
- Use Apple Intelligence in Messages
- Use Apple Intelligence with Siri
- Get web page summaries
- Summarise an audio recording
- Create original images with Image Playground
- Use Apple Intelligence in Photos
- Summarise notifications and reduce interruptions
- Use ChatGPT with Apple Intelligence
- Apple Intelligence and privacy
- Block access to Apple Intelligence features
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- Intro to Continuity
- Use AirDrop to send items to nearby devices
- Hand off tasks between devices
- Control your iPhone from your Mac
- Copy and paste between devices
- Stream video and audio with AirPlay
- Make and receive calls and text messages on your Mac
- Use your iPhone internet connection with your Mac
- Share your Wi-Fi password with another device
- Use iPhone as a webcam
- Insert sketches, photos and scans from iPhone or iPad
- Unlock your Mac with Apple Watch
- Use your iPad as a second display
- Use one keyboard and mouse to control Mac and iPad
- Sync music, books and more between devices
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- Control what you share
- Set up your Mac to be secure
- Allow apps to see the location of your Mac
- Use Private Browsing
- Keep your data safe
- Understand passwords
- Change weak or compromised passwords
- Keep your Apple Account secure
- Use Mail Privacy Protection
- Use Sign in with Apple for apps and websites
- Find a missing device
- Resources for your Mac
- Resources for your Apple devices
- Copyright
Change your Mac display’s brightness
You can adjust the display’s brightness manually or automatically.
Use the brightness function keys
If the screen seems too light or too dark, you can adjust your display’s brightness.
On your Mac, press
or 
(or use the Control Strip).
Automatically adjust brightness
If your Mac has an ambient light sensor, choose Apple menu
in the sidebar. (You may need to scroll down.)Turn on “Automatically adjust brightness”.
If you don’t see the “Automatically adjust brightness” option, you can manually adjust the brightness.
Turning off auto-brightness may affect battery life, energy consumption and long-term display performance.
Manually adjust brightness
On your Mac, choose Apple menu
Drag the Brightness slider to adjust the brightness of your display.
Depending on the type of display connected to your Mac, you may also see a Contrast slider that you can use to adjust the display’s contrast.
For specific information about the brightness of your display, check the documentation that came with your display.