Open System Settings and Find the Desktop & Screen Saver Panel

The fastest way to change your MacBook background is through System Settings. Click the Apple menu in the top-left corner of your screen, then select System Settings. On the left sidebar, scroll down and click Wallpaper. Your Mac will show you a preview of your current desktop on the right side of the window.

If you are using an older version of macOS (Monterey or earlier), the path is slightly different: click the Apple menu, select System Preferences, then click Desktop & Screen Saver. The steps that follow are the same.

Key Takeaways

  • Open System Settings, then click Wallpaper to see all available background options.
  • Apple provides built-in wallpapers organized by category — you can preview each one before selecting it.
  • You can use your own photos as a background by clicking the Add button and selecting an image file from your computer.
  • If you have multiple displays, you can set different backgrounds on each one from the same Wallpaper panel.

Choose From Apple's Built-In Wallpapers or Add Your Own

The Wallpaper panel shows you several categories of backgrounds: Dynamic (which change throughout the day), Still (static images), and Collections (organized themes like Nature, Landscapes, or Solid Colors). Click any category to see the wallpapers inside it. Hover over an image to preview it on your desktop without applying it yet.

To use one of these built-in wallpapers, simply click it once. Your desktop background changes immediately. If you want to use your own photo instead, click the Add button (usually a plus sign) at the bottom of the window, then navigate to the image file on your computer. Select the photo and click Open. Your custom image will appear in the list and become your new background.

Adjust How Your Image Fits the Screen

When you select a custom photo, macOS gives you options for how it displays. Look for a dropdown menu labeled Fit or Fill — the exact name depends on your macOS version. The most common options are:

  • Fill Screen: The image scales up to cover the entire display, which may crop parts of the photo.
  • Fit Screen: The entire image appears on your desktop, but you may see empty space around it if the photo's shape does not match your screen.
  • Stretch: The image stretches to fill the screen, which can distort the photo if its proportions are very different from your display.

Select whichever option looks best for your photo. You can change this setting anytime by going back to the Wallpaper panel.

Set Different Backgrounds for Multiple Displays

If you have an external monitor connected to your MacBook, you can set a different background on each display. In the Wallpaper panel, you will see tabs or buttons at the top representing each connected display. Click the tab for the display you want to change, then select a wallpaper or custom image for that screen. Repeat for each display.

This works the same way whether you are using one external monitor or several. Each display's background is controlled independently, so you can have a photo on your MacBook screen and a solid color on your external monitor, or any other combination you prefer.

Use Dynamic Wallpapers That Change Throughout the Day

macOS includes Dynamic wallpapers that shift their appearance based on the time of day. These images gradually change from morning to evening, creating a natural progression on your desktop. To use one, open the Wallpaper panel, click the Dynamic category, and select any image in that section. The wallpaper will automatically adjust as hours pass.

Dynamic wallpapers work best if you keep your Mac on or in sleep mode throughout the day. If you shut down your computer regularly, you may not see the full progression. You can switch back to a static wallpaper anytime by selecting an image from the Still category.

Troubleshoot Common Background Problems

If your background does not change after you select a new one, try closing and reopening the Wallpaper panel. Sometimes the display takes a moment to refresh. If the panel itself will not open, restart your Mac — this usually fixes temporary glitches in System Settings.

If a custom photo appears stretched or distorted, try changing the Fit setting. If you uploaded a very small image (less than 800 pixels wide), it may look blurry when stretched to fill a large screen — using a higher-resolution photo will solve this. You can also check whether your image file is corrupted by trying to open it in the Photos app or Preview first.

Frequently Asked Questions

Can I set a different background for each Space or desktop?

No — your wallpaper applies to all Spaces at once. However, you can change your background whenever you want by opening the Wallpaper panel again, so you can switch it manually if you use multiple Spaces throughout the day.

What image formats does macOS accept for custom backgrounds?

macOS accepts JPEG, PNG, HEIF, and TIFF files. Most photos from your camera or phone are already in one of these formats. If you have an image in a different format (like BMP or GIF), you can convert it using Preview or a free online converter before uploading it.

Why does my custom photo look different on my MacBook screen than it did in Photos?

This usually happens because of the Fit setting. If you chose Fill, parts of the photo are cropped. If you chose Fit, empty space appears around the edges. Try switching to a different Fit option to see which one shows your photo the way you want it.

Can I schedule my background to change automatically at certain times?

Not through System Settings directly. However, if you use a Dynamic wallpaper, it changes automatically throughout the day. For custom images, you would need a third-party app from the App Store that handles scheduled wallpaper changes.