The fastest way to change your Mac wallpaper

Open System Settings, click Wallpaper in the sidebar, pick a category on the left, select an image, and click Set Desktop Picture. That's the whole process—it takes about 30 seconds. Your new wallpaper appears when ready on your desktop and lock screen.

If you want to use your own photo instead of Apple's built-in images, the steps are the same, but you'll navigate to your photo first. Both methods work the same way on any recent Mac running macOS Ventura or later.

Key Takeaways

  • Open System Settings, then click Wallpaper in the sidebar to reach the wallpaper menu.
  • Choose from Apple's built-in collections like Nature, Landscapes, or Solid Colors, or click the plus sign to add your own photos.
  • One image can be set as your desktop wallpaper, lock screen wallpaper, or both at the same time.
  • If you want different wallpapers on each monitor, set them one monitor at a time from the Displays section of System Settings.

Step-by-step: Using Apple's built-in wallpapers

Click the Apple menu in the top-left corner of your screen, then select System Settings. Wait for the settings window to open—it usually takes a few seconds.

In the sidebar on the left, scroll down until you see Wallpaper and click it. A grid of wallpaper categories appears: Nature, Landscapes, Solid Colors, and others. Click any category to see the images inside it.

Click the image you want. A preview appears on the right side of the window. Below the preview, you'll see two buttons: Set Desktop Picture and Set Lock Screen. Click Set Desktop Picture to put it on your main desktop, Set Lock Screen to put it on your lock screen when your Mac is sleeping, or click both buttons to use the same image in both places.

Step-by-step: Using your own photos

Open System Settings and click Wallpaper in the sidebar, just as above. At the top of the wallpaper categories, you'll see a plus sign (+). Click it.

A file browser opens. Navigate to the folder where your photo is stored—usually Pictures, Downloads, or a folder you created yourself. Click the photo you want, then click Open. The photo now appears in your wallpaper categories as a new section at the top.

Click your photo to select it, then click Set Desktop Picture or Set Lock Screen, the same way you would with a built-in wallpaper. If the photo is very small or very large compared to your screen, macOS will automatically scale it to fit.

What to do if your wallpaper won't change

If you click Set Desktop Picture but nothing happens, close System Settings completely and open it again. Sometimes the settings window gets stuck and needs to refresh.

If you're trying to use a photo from an external drive or cloud storage, make sure the drive is connected or the file has finished downloading. Photos stored only in iCloud (not downloaded to your Mac) sometimes won't work as wallpapers. Copy the photo to your Pictures folder first, then try again.

If you're using a work Mac managed by your company, your IT department may have locked the wallpaper so it can't be changed. Contact them to ask if they can unlock it or change it for you.

Setting different wallpapers on multiple monitors

If you have two or more monitors connected to your Mac, you can set a different wallpaper on each one. Open System Settings and click Wallpaper. At the top of the window, you'll see a dropdown menu that says "All Displays" or the name of your current monitor.

Click that dropdown and select the monitor you want to change. Pick your wallpaper and click Set Desktop Picture. Then switch to the next monitor using the same dropdown and repeat. Each monitor remembers its own wallpaper.

Wallpaper tips and common mistakes

Don't use a photo that's much smaller than your screen resolution—it will look blurry or pixelated when stretched. If you're not sure, use a photo that's at least 1920 pixels wide. Most modern phone photos and camera photos are large enough.

If you want your wallpaper to change automatically throughout the day, open System Settings, click Wallpaper, select a dynamic wallpaper (like Monterey or Big Sur), and look for a dropdown that says "Light" or "Dark" or "Auto". Choose Auto, and your wallpaper will shift between light and dark versions depending on the time of day.

Remember that your wallpaper appears behind your desktop icons and windows. If you choose a very busy or colorful image, your icons may be hard to read. Solid colors or images with a clear, straightforward area in the center usually work best.

Frequently Asked Questions

Can I set a different wallpaper on my lock screen than my desktop?

Yes. Open System Settings, click Wallpaper, pick an image, and click Set Lock Screen. Then pick a different image and click Set Desktop Picture. Each one remembers its own wallpaper separately.

What image formats does Mac wallpaper support?

Mac accepts JPEG, PNG, HEIF, and TIFF files. Most photos from your phone or camera are already in one of these formats. If you read an image from the internet and it won't work, try converting it to JPEG using a free online converter.

Why does my wallpaper look different on my lock screen than on my desktop?

macOS sometimes crops or adjusts the image slightly to fit each screen. If this bothers you, use the same image for both and adjust the crop yourself before setting it, or choose a straightforward image with no important details near the edges.

Can I schedule my wallpaper to change on a timer?

Not with the built-in settings. However, you can set a dynamic wallpaper to change automatically between light and dark versions based on time of day. For more control, search the Mac App Store for "wallpaper changer" apps that let you rotate through multiple images on a schedule.