The fastest way to change your Mac desktop

Open System Settings, go to Wallpaper, pick a new image, and you're done. The whole process takes under a minute. Your Mac comes with built-in wallpapers you can use immediately, or you can upload your own photos from your computer.

If you're not sure where System Settings is, look in the top-left corner of your screen for the Apple menu (the apple symbol). Click it, then select System Settings from the dropdown. On older Macs running Big Sur or earlier, it's called System Preferences instead, but the steps are the same.

Key Takeaways

  • System Settings > Wallpaper is where you change your desktop background on any recent Mac.
  • You can choose from Apple's built-in wallpapers or upload any photo from your computer.
  • If you have multiple monitors, you can set different wallpapers on each one.
  • Your choice saves automatically — you don't need to click a save button.

Step-by-step: Using a built-in wallpaper

Step 1: Click the Apple menu in the top-left corner of your screen, then click System Settings (or System Preferences on older Macs).

Step 2: In the sidebar on the left, click Wallpaper. You'll see thumbnails of available wallpapers organized by category — Dynamic, Still, and Collections.

Step 3: Click any wallpaper thumbnail to preview it on your desktop. If you like it, it's already set. If you want to try another, just click a different one. There's no confirmation step needed.

The wallpaper changes instantly. Close System Settings whenever you're ready — your choice stays in place until you change it again.

Step-by-step: Using your own photo

Step 1: Open System Settings and click Wallpaper in the sidebar.

Step 2: At the bottom of the wallpaper list, you'll see a folder icon or a section labeled with your photo library. Click the plus sign (+) or "Add" button to browse your computer.

Step 3: Navigate to the photo you want to use. It can be anywhere on your Mac — your Downloads folder, Pictures folder, Desktop, or any other location. Click the photo once to select it, then click Open.

Step 4: The photo appears as a new option in your wallpaper list. Click it to set it as your desktop background. If the photo is very wide or very tall, your Mac will automatically crop it to fit your screen without distorting it.

You can add as many of your own photos as you want. Each one stays in your wallpaper list so you can switch between them anytime.

What to do if your photo looks stretched or cut off

When you select a photo, your Mac shows you exactly how it will look on your desktop before you confirm. If the photo is the wrong shape for your screen, you'll see it cropped or positioned oddly in the preview.

If this happens, you have two choices: use a different photo that's closer to your screen's shape, or go back and edit the photo in a program like Photos or Preview to crop it yourself before setting it as your wallpaper. Most photos taken on phones work fine because phone screens and Mac screens have similar proportions.

Setting different wallpapers on multiple monitors

If you have more than one monitor connected to your Mac, you can set a different wallpaper on each one. Open System Settings, click Wallpaper, and you'll see a small thumbnail of each monitor at the top of the window.

Click the thumbnail for the monitor you want to change, then pick your wallpaper. Repeat for each monitor. Each one remembers its own choice independently.

Wallpapers that change throughout the day

Some of Apple's built-in wallpapers are labeled "Dynamic." These change their appearance based on the time of day — they might show a sunrise in the morning and a sunset in the evening. They work automatically once you select them; you don't need to do anything else.

If you prefer a static image that never changes, stick with the "Still" category. You can also set your own photos, which will always stay the same.

Frequently Asked Questions

Can I use a photo from the internet as my wallpaper?

Yes. Right-click the image in your web browser and select "Save Image As." Choose where to save it on your Mac, then follow the steps above to set it as your wallpaper. Make sure you have permission to use the image.

Why does my wallpaper look different after I set it?

Your Mac may have automatically cropped or repositioned your photo to fit your screen. This is normal. If you don't like how it looks, try a different photo or edit the original image to a different size before setting it as your wallpaper.

Will changing my wallpaper affect my files or programs?

No. Your wallpaper is purely visual and has no effect on anything else on your Mac. You can change it as often as you want without any consequences.

How do I go back to the default Apple wallpaper?

Open System Settings, click Wallpaper, and select any of the built-in wallpapers from the list. Your Mac doesn't have a single "default" — just pick whichever Apple wallpaper you prefer.

Can I schedule my wallpaper to change automatically?

Not through System Settings directly. However, if you select one of Apple's Dynamic wallpapers, it will change throughout the day on its own. For custom scheduling, you would need a third-party application from the Mac App Store.