The fastest way to change your Mac background

Open System Settings (or System Preferences on older Macs), click Wallpaper in the sidebar, then select a new image from the gallery or choose your own photo. The change takes effect when ready. If you want to use a photo from your computer instead of Apple's built-in options, click the + button, find your image file, and click Set Desktop Picture.

The whole process takes about 30 seconds. You can set different backgrounds for each desktop space you have open, and you can change it back anytime by following the same steps.

Key Takeaways

  • System Settings > Wallpaper is the main control panel for your desktop background on all recent Mac models.
  • You can use Apple's built-in image library or upload any photo from your computer, including screenshots and downloaded images.
  • If you have multiple desktops or spaces, each one can have its own background image.
  • Changing your background does not affect your login screen unless you specifically set it in the same menu.

Finding System Settings on your Mac

On macOS Ventura and newer (released 2022 onward), click the Apple menu in the top-left corner, then select System Settings. On older Macs running macOS Monterey or earlier, the menu is called System Preferences instead, but the steps are identical.

You can also press Command + Space to open Spotlight search, type "wallpaper," and press Enter—this jumps straight to the wallpaper settings without opening the full Settings menu.

Choosing from Apple's built-in wallpapers

Once you are in System Settings > Wallpaper, you will see categories on the left side: Collections, Colors, Dynamic, and Recent. Click any category to see what is available. Collections include themes like Nature, Landscapes, Solid Colors, and Abstract. Dynamic wallpapers change appearance based on the time of day.

Click the image you want, and it becomes your desktop background when ready. You can preview how it looks before confirming—the preview appears in the main window. If you do not like it, just click a different one.

Using your own photos as a background

To use a photo stored on your Mac, click the + button at the bottom of the wallpaper list. A file browser opens. Navigate to the folder where your photo is saved—usually Pictures, Downloads, or Desktop. Select the image and click Set Desktop Picture.

You can use any image format: JPG, PNG, HEIF, or others. The image will scale to fit your screen, so very small images may look blurry, and very large ones will be cropped. If you want to use multiple photos and rotate them, you can set that up in the same menu by checking the Change picture option and choosing how often (every hour, every day, or when waking from sleep).

Setting different backgrounds for multiple desktops

If you use multiple desktops or spaces on your Mac, each one can have its own background. Switch to the desktop you want to change, then open System Settings > Wallpaper and select a new image. That background applies only to the space you are currently in.

To switch between desktops, swipe left or right with three fingers on your trackpad, or press Control + Right Arrow or Control + Left Arrow. Once you are on the desktop you want, change its background the same way you would for your main desktop.

Changing your login screen background

The login screen (the screen you see before you enter your password) can have a different background from your desktop. To change it, open System Settings > Wallpaper, select the image you want, then check the box that says Set as login screen or Use as login window background (the exact wording varies by macOS version).

If you do not see this option, your Mac may be set to show a solid color or your user account picture on the login screen instead. You can change that in System Settings > Lock Screen, where you can choose what appears when your Mac is locked or at the login prompt.

Common issues and how to fix them

The image looks stretched or blurry: This usually means the image is too small for your screen resolution. Try a larger photo, or use one of Apple's built-in wallpapers, which are optimized for all screen sizes.

The background reverts to the default after restart: This is rare but can happen if the image file was moved or deleted after you set it. Make sure the photo stays in the same folder. If you moved it, go back to System Settings > Wallpaper and select it again from its new location.

You cannot find the Wallpaper option: On very old Macs (pre-2016), the setting may be under System Preferences > Desktop & Screen Saver instead of Wallpaper. The process is the same—click your image and it becomes your background.

Frequently Asked Questions

Can I use a video as my Mac background?

No, Mac desktop backgrounds must be still images. However, you can set a dynamic wallpaper that changes throughout the day, which creates a similar effect. Some third-party apps offer video backgrounds, but they run in the background and use more battery power.

Will changing my background affect my Mac's performance?

No. A static background uses almost no system resources. Dynamic wallpapers that change throughout the day use slightly more power, but the difference is negligible on modern Macs. If you are concerned about battery life, stick with a static image.

How do I remove a background I added and go back to the default?

Open System Settings > Wallpaper, click Collections, and select one of Apple's built-in options. Your custom image will no longer be the background. The original image file on your computer is not deleted—only the background setting changes.

Can I set a different background for each user account on my Mac?

Yes. Each user account has its own System Settings. Log in as a different user, open System Settings > Wallpaper, and set a background for that account. When you switch users, the background changes automatically.

What if my image is the wrong size for my screen?

macOS automatically scales the image to fit your screen. If it looks stretched, the original image may have a different aspect ratio than your display. Try cropping the image to match your screen's proportions before setting it as your background, or choose one of Apple's built-in wallpapers, which are pre-sized for all screen types.