The quickest way to change your wallpaper

On Windows, right-click any empty space on your desktop and select Personalize. Click Background in the left menu, then choose Picture from the dropdown. You can pick from built-in images or click Browse to use a photo from your computer. On Mac, open System Settings, click Wallpaper, then select a category on the left and click the image you want.

Both systems let you change your wallpaper in under a minute. The image you choose appears behind your icons and open windows, and you can swap it out whenever you like without affecting any of your files or programs.

Key Takeaways

  • Windows users right-click the desktop, select Personalize, then Background to pick a new image.
  • Mac users open System Settings, click Wallpaper, and select from categories or their own photos.
  • You can use any image file on your computer—JPG, PNG, and BMP files all work on both systems.
  • Changing your wallpaper does not affect your files, programs, or system performance.
  • Both Windows and Mac come with built-in wallpaper collections you can use without downloading anything.

How to change wallpaper on Windows 10 and Windows 11

Start by right-clicking any blank area of your desktop—not on an icon or taskbar, but on the empty gray or blue space. A menu will pop up. Click Personalize near the bottom of that menu.

The Settings window opens. On the left side, you'll see a menu. Click Background. In the main area, you'll see a dropdown that says Personalize your background. Click it and choose Picture. Below that, Windows shows thumbnail images you can pick from right away—these are built-in wallpapers that come with your system.

If you want to use your own photo instead, click the Browse button. A file window opens. Navigate to the folder where your image is stored, click the image, and click Choose picture. The image appears on your desktop when ready. You can close the Settings window.

How to change wallpaper on Mac

Click the Apple menu in the top-left corner and select System Settings. In the sidebar on the left, click Wallpaper. A panel opens showing different categories—Desktop, Landscapes, Abstract, and others. Click any category to see the images inside it.

Click the image you want. It appears on your desktop right away. If you want to use a photo from your computer instead of a built-in image, click Add (a plus sign) at the bottom of the window, navigate to your photo, and click Choose. You can close System Settings after that.

Using your own photos as wallpaper

Both Windows and Mac let you pick any image file from your computer. The most common formats—JPG, PNG, and BMP—work on both systems. If you have a photo in your Pictures folder, Documents folder, or Downloads folder, you can use it.

On Windows, click Browse in the Background settings and navigate to the folder where your photo is stored. On Mac, click the Add button in Wallpaper settings and do the same. Once you select the image, it becomes your wallpaper. You can change it back to a built-in image anytime by following the same steps and picking a different option.

What to do if your wallpaper won't change

If you've followed the steps but your wallpaper hasn't changed, restart your computer. Sometimes Windows or Mac needs to refresh to display the new image. After restarting, check your desktop to see if the change took effect.

If the wallpaper still hasn't changed, make sure the image file isn't corrupted. Try picking a different image—one of the built-in wallpapers—to test whether the problem is with your chosen image or with the wallpaper settings themselves. If a built-in image works, the issue is with your photo file. If even built-in images won't change, restart your computer again or check that you have the latest updates installed for your operating system.

Wallpaper size and resolution

Your computer works best with wallpaper images that match your screen's resolution. Windows and Mac automatically scale images to fit, so a photo that's too small or too large will still appear on your desktop—it just might look blurry or stretched. Most modern photos from phones or cameras work fine without adjustment.

If you want the sharpest result, use an image that's at least as wide and tall as your screen resolution. You can check your screen resolution in Display settings on Windows (right-click the desktop, select Display settings) or in System Settings on Mac (click Apple menu, then System Settings, then Displays). Common resolutions are 1920 × 1080 or 2560 × 1440, but your screen may differ.

Changing wallpaper for your lock screen

On Windows 11, you can also change the image that appears when your computer is locked. Right-click the desktop and select Personalize, then click Lock screen in the left menu. Click the dropdown under Personalize your lock screen, select Picture, and choose an image the same way you would for your desktop wallpaper.

On Mac, the lock screen and desktop wallpaper are linked—changing one changes the other. If you want a different image on your lock screen, you'll need to change your desktop wallpaper.

Frequently Asked Questions

Can I set different wallpapers for multiple monitors?

On Windows 11, yes. Right-click the desktop, select Personalize, then Background. Click the image you want to change, and a dropdown appears showing your monitors. Select which monitor to explore it to. On Mac, you can only set one wallpaper that appears on all connected displays.

Will changing my wallpaper slow down my computer?

No. Your wallpaper is just a background image and does not affect how fast your computer runs or how much memory it uses. You can change it as often as you like without any performance impact.

What if I accidentally delete a built-in wallpaper?

You haven't deleted it. Built-in wallpapers are part of your operating system and stay on your computer. If you chose a built-in image and then changed to something else, you can always go back to Personalize or Wallpaper settings and pick the built-in image again.

Can I use a video or animated image as my wallpaper?

Windows 11 supports animated wallpapers through the Microsoft Store, but the standard Personalize menu only accepts still images. Mac does not support animated wallpapers through System Settings. Both systems work best with static JPG or PNG files.