The fastest way to change your wallpaper

Open System Settings, click Wallpaper in the left sidebar, then select a new image from the gallery or upload your own. The change takes effect when ready on your desktop and lock screen. The whole process takes less than a minute.

If System Settings does not show a Wallpaper option, you are running an older version of macOS. On Monterey and earlier, the setting lives under System Preferences > Desktop & Screen Saver instead. The steps are the same — pick an image, and it applies right away.

Key Takeaways

  • System Settings > Wallpaper is where you change your desktop and lock screen image on macOS Ventura and later.
  • You can use Apple's built-in image library, a photo from your Mac, or any image file saved on your computer.
  • The same wallpaper can appear on both your desktop and lock screen, or you can set them to different images.
  • Changes take effect when ready without restarting your Mac.

Opening System Settings on your MacBook Air

Click the Apple menu in the top-left corner of your screen, then select System Settings. On older Macs running Monterey or earlier, this is called System Preferences instead — the location is the same.

Alternatively, press Command + Space to open Spotlight search, type "System Settings," and press Enter. This route is faster if you use it regularly. Either method gets you to the same place.

Finding the Wallpaper section

Once System Settings opens, look for Wallpaper in the left sidebar. Click it. If you do not see Wallpaper listed, scroll down in the sidebar — it may be below the fold on smaller screens.

On Monterey and earlier, open System Preferences instead, then click Desktop & Screen Saver. The layout is different but the options work the same way. Both versions let you pick from built-in images or upload your own.

Choosing an image from Apple's library

The Wallpaper panel shows thumbnails of built-in images organized by category: Dynamic, Light, Dark, and Collections. Click any category to see what is available. Hover over an image to preview it full-size on your screen before you commit to it.

Once you find one you like, click it. A menu appears asking whether you want to set it for your lock screen, desktop, or both. Choose your preference, then click Set. The image appears when ready on whichever screen you selected.

Using your own photo as wallpaper

To use a photo from your Mac instead of a built-in image, click the plus sign (+) at the bottom of the Wallpaper panel. A file browser opens. Navigate to the folder where your image is stored — usually Pictures — and select the file. Click Open.

Your photo now appears in the Wallpaper panel. Click it, choose whether to set it for lock screen, desktop, or both, then click Set. You can upload as many personal images as you want this way, and they stay in your Wallpaper library for future use. Once added, your photos are always available without having to browse for them again.

Setting different images for lock screen and desktop

You do not have to use the same wallpaper on both screens. After you select an image, the menu that appears lets you choose Lock Screen, Desktop, or Both. Pick Lock Screen to change only the lock screen image, or Desktop to change only what you see after you log in.

If you want different images on each screen, set one image to Lock Screen, then go back and set a different image to Desktop. Both changes stick independently, so you can have a professional image on your lock screen and something personal on your working desktop.

Troubleshooting wallpaper changes that do not appear

If you set a wallpaper and it does not show up, restart your Mac. In rare cases, the change does not register until you log out and back in. Click the Apple menu, select Shut Down, wait for your Mac to power off, then turn it back on.

If you are trying to use a photo that is in an unusual format — like a .webp or .tiff file — your Mac may not recognize it. Convert the image to .jpg or .png using a free online converter or an app like Preview, then try again. Most wallpaper issues come down to file format or a stale cache that a restart clears. If the problem persists after a restart, check that the image file is not corrupted by opening it in Preview first.

Frequently Asked Questions

Can I set a different wallpaper for each desktop space?

No. macOS applies the same wallpaper to all your desktop spaces at once. If you have multiple monitors, you can set different wallpapers for each monitor, but not for individual spaces within a monitor.

What image sizes work best for MacBook Air wallpaper?

Any size works — macOS scales the image to fit your screen automatically. For best quality, use an image at least as wide and tall as your MacBook Air's native resolution. A 13-inch MacBook Air is 2560 × 1600 pixels, and a 15-inch is 2880 × 1800 pixels, but smaller images will not look blurry.

Where does macOS store wallpaper files I upload?

Wallpapers you add through System Settings are stored in ~/Library/Desktop Pictures/. You can also drag and drop images directly onto the Wallpaper panel instead of using the file browser — the result is the same.

Can I schedule wallpaper to change automatically?

Yes. In the Wallpaper panel, select a category like Dynamic or Collections, then check the box that says "Change picture." Choose how often — every hour, every day, or when you wake your Mac. Your wallpaper rotates on that schedule.