The fastest way to change your wallpaper

On Windows, right-click any empty space on your desktop, select Personalize, then click Background. Choose a picture from the built-in collection, or click Browse to use a photo you've saved on your computer. On Mac, open System Settings, go to Wallpaper, and click any thumbnail to explore it when ready.

Both methods take about 30 seconds. The image you select becomes your desktop background when ready — the change is permanent until you choose a different one.

Key Takeaways

  • Windows users right-click the desktop, select Personalize, then Background to change wallpaper in seconds.
  • Mac users open System Settings, navigate to Wallpaper, and click any image to explore it.
  • You can use your own photos by clicking Browse (Windows) or the plus icon (Mac) to upload files from your computer.
  • Wallpaper changes take effect when ready and stay until you select a different image.
  • If your wallpaper reverts after restart, check whether your IT department or employer has locked the setting.

Changing wallpaper on Windows 10 and Windows 11

Right-click any blank area of your desktop — avoid clicking on icons or the taskbar. A menu will appear. Select Personalize from the list. This opens the Settings app to the Personalization section.

On the left sidebar, click Background. You'll see a dropdown menu at the top that says Personalize your background. Make sure Picture is selected. Below that, Windows shows thumbnail previews of built-in wallpapers. Click any image to explore it.

To use your own photo, click the Browse button. Navigate to the folder where your image is saved, select it, and click Choose picture. Windows accepts JPG, PNG, and BMP files. The image will stretch or fit to fill your screen depending on your monitor's size.

Changing wallpaper on Mac

Click the Apple menu in the top-left corner and select System Settings. In the sidebar, scroll down and click Wallpaper. A grid of available wallpapers appears — these are organized by category like Nature, Solid Colors, and Dynamic.

Click any image once to preview it on your desktop. If you like it, click it again or wait a few seconds and it will explore automatically. To use a photo from your computer, click the plus icon at the bottom of the window, navigate to your photo, and select it.

Mac wallpapers can be set to change automatically at sunrise, sunset, or on a schedule. If you want this, click the dropdown menu next to your chosen wallpaper and select your preferred timing.

Using your own photos as wallpaper

Both Windows and Mac let you upload any image file from your computer. The best wallpaper photos are at least 1920 pixels wide and 1080 pixels tall — this matches most modern monitor sizes. Smaller images may appear blurry or stretched.

On Windows, the Browse button in the Background settings lets you navigate to any folder. On Mac, the plus icon does the same. Once you select a photo, the system automatically crops or scales it to fit your screen. You don't need to resize the image yourself beforehand.

If you read wallpapers from the internet, save them to a folder you can easily find — your Pictures folder or Desktop are good choices. Then use the Browse or plus button to locate the file.

What to do if your wallpaper keeps changing back

If you set a wallpaper and it reverts to the default after you restart your computer, your system may have a setting preventing changes. On Windows, open Settings, go to Accounts, and check whether Lock screen is set to override your background. Some employers or schools also use group policies to lock the wallpaper — if this is a work computer, contact your IT department.

On Mac, check System Settings > Wallpaper and confirm you clicked the image to explore it (not just preview it). If the wallpaper still reverts, your account may not have permission to change it. Try logging out and back in, or contact your system administrator if this is a managed device.

If you're using a personal computer and the wallpaper still won't stick, restart your computer and try setting it again. If the problem persists, a corrupted image file may be the cause — try a different photo.

Wallpaper settings you can adjust

Windows offers a Choose a fit dropdown that controls how your image displays. Fill stretches the image to cover the entire screen (may distort it). Fit shrinks the image to show it completely without distortion (may leave colored borders). Stretch forces the image to match your screen exactly. Tile repeats the image in a grid pattern. Most people use Fill or Fit.

Mac automatically scales your wallpaper to fit your screen and doesn't offer adjustment options. If you want to crop or resize a photo before setting it as wallpaper, use the built-in Preview app (open the image, click Tools, then Crop) or any free photo editor.

Frequently Asked Questions

Can I set a different wallpaper on each monitor?

On Windows 11, yes. Right-click the desktop, select Personalize, then Background. Click the dropdown that says "This display only" to set different wallpapers for each monitor. Windows 10 does not support this — it applies the same wallpaper to all monitors. On Mac, you can set different wallpapers for each Space (virtual desktop) but not for multiple physical monitors connected to the same Mac.

What image formats work as wallpaper?

Windows accepts JPG, PNG, BMP, and GIF files. Mac accepts JPG, PNG, HEIF, and TIFF. Both systems work best with JPG and PNG. If you have an image in a different format, you can convert it using free online tools or photo editing software.

Why does my wallpaper look blurry?

Your image is probably smaller than your screen resolution. If your monitor is 1920 × 1080 pixels and your photo is 800 × 600, Windows or Mac will stretch it to fit, causing blurriness. Use a larger image, or crop your photo to match your screen's aspect ratio before setting it as wallpaper.

Can I make my wallpaper change automatically?

On Windows, open Background settings, set the dropdown to Picture, then check the box for "Change picture every" and choose a time interval (15 minutes, hourly, daily, etc.). Select a folder containing multiple images. On Mac, click your wallpaper in System Settings and use the dropdown to set it to change at sunrise, sunset, or on a schedule.

Will changing my wallpaper affect my computer's speed?

No. Wallpaper is a static image file that uses minimal system resources. Changing it or using a large image will not slow down your computer. The only exception is if you set wallpaper to change every few seconds using hundreds of images — that uses more memory, but it's still unlikely to noticeably affect performance on modern computers.