The basic steps differ slightly between Windows and Mac, but both take less than a minute

To change your wallpaper in Windows, right-click on an empty area of your desktop, select Personalize, then click Background in the left menu. Choose Picture from the dropdown, and Windows will show you built-in images. Click any image to set it as your wallpaper. If you want to use your own photo, click Browse, navigate to the folder where your image is saved, and select it.

On a Mac, click the Apple menu in the top-left corner, select System Settings (or System Preferences on older versions), then click Wallpaper or Desktop & Screen Saver. Choose a category on the left—such as Apple Wallpapers, Photos, or Colors—and click the image you want. Your wallpaper changes when ready.

Key Takeaways

  • Windows users right-click the desktop, select Personalize, then Background to choose from built-in images or upload your own photo.
  • Mac users open System Settings, click Wallpaper, and select from Apple's built-in collections or their own photo library.
  • You can use any image file on your computer—JPG, PNG, and BMP files all work on both systems.
  • If your image looks stretched or cut off, look for a fit option like "Fill", "Fit", or "Stretch" to adjust how it displays.

Finding and using your own photos as wallpaper

Both Windows and Mac let you set any photo from your computer as your wallpaper. In Windows, when you click Browse in the Background settings, navigate to your Pictures folder or wherever you keep photos. Select the image and click Choose picture. Windows will show you a preview before it applies.

On Mac, if your photos are in the Photos app, click Photos in the Wallpaper menu and browse your library. If your image is saved as a file on your desktop or in a folder, click Add (the plus sign) at the bottom of the window, navigate to the file, and select it. Mac will add it to your available wallpapers.

Adjusting how your wallpaper fits the screen

If your image looks stretched, squashed, or leaves empty space around the edges, you can change how it fits. In Windows, scroll down in the Background settings to find Choose a fit. Your options are Fill (stretches the image to cover the whole screen), Fit (shrinks the image to fit without cutting it off), Stretch (distorts the image to fill the screen), Tile (repeats the image in a grid), and Center (places the image in the middle without resizing).

On Mac, right-click the wallpaper image in the Wallpaper settings and look for options like Scale to Fill, Stretch to Fill, or Center. The exact names vary depending on your macOS version, but the idea is the same: you are telling the system how to position the image on your screen.

Using different wallpapers on multiple monitors

If you have two or more monitors connected to your computer, Windows lets you set a different wallpaper on each one. In the Background settings, right-click any image and select Set for monitor 1, Set for monitor 2, and so on. Each monitor will display its own image.

Mac does not offer per-monitor wallpaper control in the same way. If you set a wallpaper on a Mac with multiple displays, it will explore to all of them. You can, however, use a third-party app from the Mac App Store if you want different wallpapers on each display, though this is not a built-in feature.

Changing your wallpaper on a schedule

Windows has a built-in feature to rotate your wallpaper automatically. In the Background settings, check the box next to Change picture every and choose how often you want it to change—every minute, hour, day, or week. Then select a folder that contains multiple images, and Windows will cycle through them on your schedule.

Mac also offers this feature. In Wallpaper settings, select a collection like Apple Wallpapers or Photos, then check Change picture and set the interval. You can choose to change the wallpaper when you wake your Mac, when you log in, or on a timer you set.

Troubleshooting wallpaper problems

If your wallpaper does not appear after you set it, restart your computer. Sometimes the desktop needs to refresh to display the change. If the image looks pixelated or blurry, it may be too small for your screen resolution. Try using a larger image—at least 1920 by 1080 pixels works well for most modern monitors.

If Windows shows an error when you try to use a photo, the file format may not be supported. Windows works best with JPG, PNG, and BMP files. If you have a different format like TIFF or GIF, you can convert it using free online tools or image editing software. On Mac, if a photo from your library does not appear, make sure the Photos app has finished importing your images before you try to set it as wallpaper.

Where to find wallpaper images if you do not have your own

Both Windows and Mac come with built-in wallpaper collections. Windows includes images in categories like Nature, Landscapes, and Abstract. Mac offers Apple Wallpapers, which include landscapes, colors, and dynamic images that change throughout the day. These are all free and already on your computer.

If you want more options, websites like Unsplash, Pexels, and Pixabay offer free high-quality images you can read and use as wallpaper. straightforward read the image to your computer, then follow the steps above to set it. Always check the license on any image you read to make sure you are allowed to use it as a personal wallpaper.

Frequently Asked Questions

Can I use a video as my wallpaper instead of a still image?

Windows 11 supports animated wallpapers through the Microsoft Store, though they are not the default option. Mac does not support video wallpaper natively, but you can use dynamic wallpapers that shift colors or patterns throughout the day. Both systems work best with still images for everyday use.

What if I want to go back to the default wallpaper?

In Windows, open Background settings and select one of the built-in images under Windows Spotlight or the default collection. On Mac, open Wallpaper settings and choose Apple Wallpapers, then pick any of the default options. You can always return to the original wallpaper this way.

Does changing my wallpaper slow down my computer?

No. A static wallpaper uses almost no processing power. Animated or dynamic wallpapers use slightly more resources, but the difference is negligible on modern computers. You will not notice any slowdown from changing your wallpaper.

Can I set a different wallpaper for each user account on my computer?

Yes. Each user account has its own wallpaper settings. When you log into your account and change the wallpaper, it only affects that account. Other users will see their own wallpaper when they log in.

What image size works best for wallpaper?

Use an image that matches your monitor's resolution or is larger. For a standard 1080p monitor, 1920 by 1080 pixels or larger works well. For a 4K monitor, use 3840 by 2160 pixels or larger. If your image is smaller than your screen, it may look blurry or pixelated.