The fastest way to change your Mac wallpaper

Open System Settings, click Wallpaper in the sidebar, and select a new image from Apple's built-in collection or upload your own photo. The change takes effect when ready on your desktop and lock screen. The whole process takes under a minute.

If you're using an older Mac running macOS Monterey or earlier, the steps are slightly different — you'll go through System Preferences instead of System Settings — but the idea is the same. Either way, you're not installing anything or changing any system files. You're just telling your Mac which image to display behind your icons.

Key Takeaways

  • Open System Settings, find Wallpaper in the sidebar, and choose from Apple's library or your own photos.
  • You can set different wallpapers for your desktop and lock screen, or use the same image for both.
  • If you use multiple desktops (Spaces), you can assign a different wallpaper to each one.
  • Older Macs running macOS Monterey or earlier use System Preferences instead of System Settings, but the process works the same way.

How to change your desktop wallpaper on a current Mac

Click the Apple menu in the top-left corner and select System Settings. In the sidebar on the left, scroll down and click Wallpaper. Your Mac will show you the current wallpaper and a library of options below it.

Click any image in the library to preview it. If you like it, it becomes your new wallpaper right away. You can choose from Apple's built-in collections — Nature, Solid Colors, Abstract, and others — or click the plus sign at the bottom to add a photo from your computer. Once you select a photo, it fills your desktop when ready.

By default, the same image appears on both your desktop and lock screen. If you want different images for each, look for the option labeled "Show as" or "Lock screen" (the exact wording depends on your macOS version) and toggle it to use a separate image for your lock screen.

Using your own photos as wallpaper

To use a photo you've taken or downloaded, open System Settings and go to Wallpaper. Click the plus sign at the bottom of the window. A file browser opens — navigate to the folder where your photo lives and click it once to select it. Then click Add.

Your photo now appears in the Wallpaper library under a "Recent" or "Custom" section. Click it to set it as your wallpaper. If the photo is very large or an unusual shape, macOS will ask how you want it positioned — you can usually choose to fill the screen, fit it without cropping, or center it. Pick whichever looks best to you.

You can add as many of your own photos as you want. They stay in your custom library so you can switch between them anytime without re-importing them.

Setting different wallpapers for each Space or desktop

If you use Spaces — the feature that lets you create multiple virtual desktops — you can assign a different wallpaper to each one. Open System Settings, go to Wallpaper, and look for an option that says "Show on all Spaces" or similar (the exact name varies by macOS version). Toggle it off.

Now when you switch to a different Space, you can set a different wallpaper there without changing the one on your main desktop. This is useful if you organize your work by Space — for example, one Space for email and documents, another for design work, another for coding — and want each to have its own look.

Changing wallpaper on older Macs (macOS Monterey and earlier)

If your Mac is running macOS Monterey, Big Sur, or an earlier version, the process is almost identical but uses a different name. Click the Apple menu and select System Preferences instead of System Settings. Then click Desktop & Screen Saver.

You'll see two tabs: Desktop and Screen Saver. Click the Desktop tab. On the left, you'll see collections like Desktop Pictures, Recent Pictures, and any custom folders you've added. Click a collection, then click an image to preview it. Click it again to set it as your wallpaper.

To use your own photo, click the plus sign at the bottom of the window, navigate to your photo, and click Open. It works exactly the way it does on newer Macs — the photo joins your library and you can switch to it anytime.

Troubleshooting wallpaper changes that don't stick

If you change your wallpaper but it reverts to the old one after you restart, your Mac may have a permissions issue or a login item that's overriding your choice. First, try changing the wallpaper again and then restarting to see if it stays.

If it still reverts, check whether you have a third-party app that manages your desktop — some screensaver apps, theme managers, or system utilities override your wallpaper choice. Look in System Settings under General > Login Items to see what's set to run at startup. If you see an unfamiliar app there, you can remove it by clicking the minus sign.

If you're using a work Mac managed by your company's IT department, your wallpaper choice may be locked by a configuration profile. In that case, contact your IT support — they can tell you whether you're allowed to change it and how.

Frequently Asked Questions

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

Yes. In System Settings under Wallpaper, look for an option to set a separate lock screen image (the exact label depends on your macOS version). Toggle it on, then choose a different image for your lock screen. Your desktop and lock screen can now show different wallpapers.

Where does macOS store the wallpapers I add?

Custom wallpapers you import are stored in your user library, usually at ~/Library/Desktop Pictures. You don't need to know this location to use them — System Settings handles it for you — but if you want to delete a custom wallpaper, you can remove it from that folder or right-click it in System Settings and choose Remove.

What image formats work as wallpaper on a Mac?

macOS accepts JPEG, PNG, HEIF, TIFF, and GIF files. Most photos you take or read will be in one of these formats already. If you have an image in a different format, you can convert it using Preview (open the image, go to File > Export, and choose a supported format) or a free online converter.

Can I make my wallpaper change automatically throughout the day?

Yes. In System Settings under Wallpaper, some of Apple's built-in collections — like Monterey, Big Sur, and Sonoma — change automatically based on the time of day. When you select one of these collections, your wallpaper will shift from light to dark as the sun sets. You can also manually set your Mac to switch between light and dark wallpapers at specific times using the General settings.

Why is my wallpaper blurry or pixelated?

This usually means the image is smaller than your screen resolution. For the sharpest result, use a photo that's at least as wide and tall as your Mac's native resolution — for example, 2560 × 1600 for a 13-inch MacBook Pro. If you're using an older photo that's smaller, macOS will stretch it to fit, which can make it look soft. Try a higher-resolution image instead.