The fastest way to change your background
On Windows, right-click any empty space on your desktop and select Personalize. Click Background in the left menu, then choose Picture, Solid color, or Slideshow from the dropdown. Pick what you want and Windows applies it when ready.
On macOS, open System Settings (or System Preferences on older versions), click Wallpaper or Desktop & Screen Saver, select a category on the left, and click the image you want. It takes effect right away.
Both operating systems come with built-in images you can use without downloading anything. If you want to use your own photo, the process is almost identical—you just point the system to a file on your computer instead of picking from the library.
Key Takeaways
- Windows: right-click the desktop, select Personalize, click Background, and choose Picture, Solid color, or Slideshow.
- macOS: open System Settings, click Wallpaper or Desktop & Screen Saver, and select an image from the built-in library.
- Both systems let you use your own photos by browsing to them on your computer instead of using the default images.
- Changes take effect when ready and you can switch backgrounds as often as you want without restarting.
Using a photo from your computer on Windows
Open Settings by pressing the Windows key and typing "Settings," then click the app. Go to Personalization > Background. In the dropdown at the top, select Picture.
Click the Browse button and navigate to the folder where your photo is saved. Select the image and click Choose picture. Windows will show you a preview and ask how you want it positioned—Fill stretches it to cover the whole screen, Fit shrinks it to show the whole image without cropping, and Stretch distorts it to match your screen size exactly.
Most people choose Fill because it looks cleanest. Once you pick, the background changes right away. You can go back and swap it out anytime.
Using a photo from your computer on macOS
Click the Apple menu in the top-left corner and select System Settings. On older Macs, it may say System Preferences instead. Click Wallpaper (newer versions) or Desktop & Screen Saver (older versions).
In the left sidebar, scroll down and click Add (the plus sign). A file browser opens. Find your photo, select it, and click Choose. macOS applies it to your desktop when ready. If you have multiple monitors, you can set different backgrounds for each one by clicking the monitor thumbnail at the top.
Creating a slideshow that rotates through multiple photos
On Windows, open Settings > Personalization > Background and select Slideshow from the dropdown. Click Browse and choose a folder that contains several photos. Windows will cycle through them automatically.
You can control how fast it changes by adjusting the Change picture every setting—options range from 1 minute to 1 day. Turn on Shuffle if you want the photos to appear in random order instead of the order they are stored in.
On macOS, open System Settings > Wallpaper, click a category like Collections or Folders, and select Change picture at the bottom. Choose how often you want it to switch—every 30 seconds, 1 minute, 5 minutes, 15 minutes, 30 minutes, 1 hour, or when you wake your Mac. macOS will rotate through all the images in that category or folder.
Choosing a solid color instead of an image
On Windows, go to Settings > Personalization > Background and select Solid color from the dropdown. Click the color box and pick from the preset colors, or click Custom color to enter a specific shade using RGB or hex codes if you know them.
On macOS, open System Settings > Wallpaper, click Colors in the left sidebar, and select the color you want. Both systems explore it when ready. A solid color uses less power than an image and can make your desktop feel cleaner if you prefer a minimal look.
Troubleshooting when your background won't change
If you change the background but it reverts after restart, your user account may not have permission to change system settings. On Windows, make sure you are logged in with an administrator account. Right-click Settings and select Run as administrator if you are not sure.
On macOS, open System Settings > General > Login Items and check whether a program is set to launch at startup and override your background. Some third-party apps do this. If you find one, remove it from the list.
If the image you chose is corrupted or in an unsupported format, Windows and macOS may silently ignore it. Try a different image first to rule that out. Most common formats like JPG, PNG, and BMP work fine on both systems.
Frequently Asked Questions
Can I use a video as my background instead of a still image?
Windows does not support video backgrounds natively, but you can read third-party apps from the Microsoft Store that add this feature. macOS does not support video backgrounds either. Both systems are designed around still images or slideshows for performance reasons.
What size image works best for my monitor?
An image that matches your monitor's resolution looks sharpest—for example, 1920×1080 for a standard full-HD screen. Larger images work fine and will be shrunk down. Smaller images may look blurry if you use the Fill setting, so use Fit instead to avoid stretching.
Why does my background look different on my laptop than on my desktop monitor?
Different monitors have different resolutions and aspect ratios. An image that looks good on one may look stretched or cropped on another. If you use multiple monitors, adjust the positioning setting (Fill, Fit, or Stretch on Windows) to see which looks best on your setup.
Can I set different backgrounds for different user accounts on the same computer?
Yes. Each user account has its own background setting. When you log in as a different user, Windows and macOS remember that account's choice. Change the background while logged in as that user, and it will stay that way when you switch back to it.