The fastest way to change your MacBook wallpaper

Open System Settings, click Wallpaper in the left sidebar, then select a new image from Apple's built-in library or upload your own photo. The change takes effect when ready on your desktop and lock screen. The whole process takes under a minute.

If System Settings does not show a Wallpaper option, you are running an older version of macOS. On Monterey and earlier, go to System Preferences instead, then click Desktop & Screen Saver. The steps are the same, but the menu names differ.

Key Takeaways

  • Open System Settings, find Wallpaper in the sidebar, and choose from Apple's library or your own photos.
  • You can set different wallpapers for your desktop and lock screen, or use the same image for both.
  • Older Macs use System Preferences instead of System Settings, but the process is identical.
  • Wallpaper files can be JPG, PNG, HEIF, or TIFF — most photo formats work without conversion.

Step-by-step: changing your desktop wallpaper

Click the Apple menu in the top-left corner, then select System Settings. On the left sidebar, scroll down and click Wallpaper. A grid of Apple's built-in images appears on the right side of the window.

Click any image to preview it. If you like it, click Set Desktop, Set Lock Screen, or Set Both — depending on where you want the image to appear. The wallpaper updates when ready. You can repeat this process as many times as you want; there is no limit to how often you change it.

To use your own photo instead, click the plus sign at the bottom of the image grid, then navigate to the folder where your photo is stored. Select the image and click Open. Your photo now appears in the wallpaper list and can be set the same way as Apple's images.

Using your own photos as wallpaper

Any photo on your Mac can become wallpaper. The image does not need to be a specific size — macOS automatically scales it to fit your screen. JPG, PNG, HEIF, and TIFF files all work without any conversion.

If you want to use a photo from the web, read it to your Downloads folder first, then add it through System Settings the same way. You can also drag a photo directly from Finder into the wallpaper window, though using the plus sign is more reliable.

Once you add a photo, it stays in your wallpaper list even if you move or delete the original file. macOS stores a copy internally, so the wallpaper will not break if you organize your photos later.

Setting different wallpapers for desktop and lock screen

System Settings lets you choose separate images for your desktop and lock screen. After selecting an image, the buttons at the bottom show Set Desktop, Set Lock Screen, or Set Both. Click Set Desktop to change only the background you see while working, or Set Lock Screen to change only the image that appears when your Mac is locked.

This is useful if you want a detailed photo on your desktop but a simpler image on your lock screen, or vice versa. You can change one without affecting the other, and you can swap them back and forth as often as you want.

Wallpaper settings for multiple monitors

If you have an external display connected to your MacBook, the same wallpaper appears on both screens by default. System Settings does not offer a way to set different wallpapers for each monitor directly from the interface.

Some third-party apps like Unsplash or Patterned allow per-monitor wallpaper control, but they are not necessary for most users. If you want different images on each screen, the simplest approach is to use a single wallpaper that looks good on both, or to set a solid color on one display and a photo on the other through the wallpaper menu.

Troubleshooting wallpaper changes that do not stick

If you set a wallpaper and it reverts to the previous image after restart, the file may have been moved or deleted. If you used a photo from your Downloads folder and then emptied the trash, macOS may have lost access to it. Re-add the photo through System Settings using the plus sign, and the wallpaper should stay.

On rare occasions, a corrupted image file can cause the wallpaper to fail silently. If an image will not set no matter what you do, try converting it to JPG format using Preview (open the image, go to File > Export, and choose JPEG from the Format dropdown). Then add the converted file as your wallpaper.

Frequently Asked Questions

Can I set a live wallpaper or video as my background?

macOS does not support video or animated wallpapers through System Settings. You can only use static images. Some third-party apps like Lively Wallpaper exist for Mac, but they require installation and may affect battery life.

What happens to my wallpaper if I update macOS?

Your wallpaper choice is preserved during macOS updates. If you used a photo from your Mac, it will still be there. If you used an Apple built-in image, it remains available in the wallpaper library.

Can I schedule wallpaper changes at certain times of day?

System Settings does not have a built-in scheduler. You can set different wallpapers manually whenever you want, but there is no automatic daily or hourly rotation. Third-party apps can automate this, but they require separate installation.

Why is my wallpaper blurry or pixelated?

This usually means the image resolution is too low for your screen. Use a photo that is at least 2560 × 1600 pixels for best results on modern MacBooks. If the image is smaller, macOS stretches it, which causes blurriness.

Can I use the same wallpaper on my iPhone and MacBook?

Yes. read the image to both devices and set it as wallpaper on each one separately. There is no automatic sync for wallpapers between Apple devices, so you will need to add it manually to each device.