The fastest way depends on your operating system

On Windows, right-click any empty space on your desktop, select Personalize, then choose Background from the left menu. Pick a built-in image, a solid color, or browse to a photo saved on your computer. On Mac, open System Settings, go to Wallpaper, and click the image you want. Both take under a minute once you know where to look.

The steps differ because Windows and Mac store settings in different places, but the end result is the same — your desktop shows what you chose instead of the default image. You do not need to download anything or restart your computer.

Key Takeaways

  • Windows users right-click the desktop, select Personalize, then Background to change the image.
  • Mac users open System Settings, navigate to Wallpaper, and select a new image from the gallery or their files.
  • You can use built-in images that come with your operating system or upload your own photos from your computer.
  • The change takes effect immediately and does not require restarting your computer.
  • If you want different backgrounds on multiple monitors, Windows lets you set a separate image for each one.

Changing your background 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 with several options. Look for and click Personalize. This opens the Settings app to the personalization section.

On the left side of the window, you will see a menu with options like Background, Colors, and Fonts. Click Background. The main panel will show you three choices: Picture, Solid color, or Slideshow. Most people choose Picture. If Picture is not already selected, click it.

Below that, you will see thumbnails of built-in images. Click any one to preview it on your desktop. If you want to use a photo you already have on your computer, click Browse and navigate to the folder where your photo is saved. Select the image and click Choose picture. The background changes immediately.

If you have two monitors connected to your computer, Windows lets you set a different background on each one. After selecting your first image, click Advanced display settings at the bottom of the Background section, then repeat the process for your second monitor.

Changing your background on Mac

Click the Apple menu in the top-left corner of your screen and select System Settings (or System Preferences on older Mac versions). In the sidebar on the left, look for Wallpaper and click it. If you do not see it immediately, scroll down in the sidebar.

The main panel shows categories of wallpapers — Desktop Pictures, Nature, Abstracts, and others. Click any category to see the images inside. Click an image once to preview it, and it becomes your background right away. You do not need to click a separate Save or Apply button.

To use your own photo, click the + button at the bottom of the window or look for an option labeled Add. Navigate to the folder where your photo is stored, select it, and click Open. The image becomes your wallpaper immediately. If you want the background to change automatically at set times, look for a Change picture dropdown and select how often you want it to switch.

Using your own photos as a background

Both Windows and Mac let you upload photos from your computer. The photo must be in a common format — JPG, PNG, BMP, or GIF are all fine. Most photos from your phone or camera are already in one of these formats.

On Windows, click Browse in the Background settings and navigate to the folder where your photo is saved. Common locations are Pictures, Downloads, or a folder you created yourself. Select the photo and click Choose picture.

On Mac, click the + button in Wallpaper settings and navigate to your photo. Select it and click Open. If the photo does not fit your screen perfectly, Mac will automatically scale or crop it to fill the space.

If your photo is very small or very large, it may look blurry or stretched. Photos that are at least 1920 by 1080 pixels work best on most modern monitors, though smaller images can still work if you do not mind the quality loss.

Troubleshooting common problems

If your background does not change after you select a new image, try closing and reopening the Settings app. On Windows, you can also right-click the desktop again and select Personalize to refresh the view. On Mac, close System Settings completely and reopen it.

If you cannot find the Personalize option on Windows, make sure you are right-clicking on an empty part of the desktop, not on an icon or window. If the Background option is grayed out or missing, your computer may have restrictions set by an administrator or workplace policy. Contact your IT department if this is a work computer.

On Mac, if Wallpaper does not appear in System Settings, scroll down in the sidebar — it may be below the fold. If the image you selected does not appear, the file may be corrupted or in an unsupported format. Try a different image to confirm the feature is working.

Slideshow backgrounds and automatic changes

Both Windows and Mac support rotating through multiple images automatically. On Windows, select Slideshow instead of Picture in the Background settings. Click Browse to choose a folder full of photos, then set how often you want the image to change — options range from every minute to every day.

On Mac, select an image in Wallpaper settings, then look for a dropdown that says Change picture. Select how often you want it to rotate — every hour, every day, when you wake your Mac, or on a custom schedule. Mac will cycle through images in that category automatically.

Slideshow backgrounds use slightly more battery power on laptops because your screen is refreshing more often. If battery life matters to you, stick with a single static image instead.

Frequently Asked Questions

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

Windows 11 supports animated wallpapers through the Microsoft Store, though they require a separate download. Standard Windows and Mac backgrounds must be still images. Some third-party apps let you use videos, but they are not built into the operating system.

What if the image I chose does not fill my entire screen?

Both Windows and Mac will scale or stretch the image to fit. If you see bars or borders, the image is smaller than your screen resolution. Choosing a larger image or adjusting the image size before uploading usually fixes this.

Does changing my background affect my computer's speed?

No. A static background uses almost no processing power. Slideshow backgrounds use slightly more resources because the image changes periodically, but the difference is not noticeable on most computers.

Can I set different backgrounds for different user accounts on the same computer?

Yes. Each user account has its own Settings, so each person can choose their own background. When you log in with your account, you see your chosen background.

Where do I find the built-in images that come with Windows or Mac?

On Windows, they are shown automatically in the Background settings under Picture. On Mac, they appear in categories like Desktop Pictures, Nature, and Abstracts in the Wallpaper settings. You do not need to download them — they are already on your computer.