The quickest way to change your Mac background

Open System Settings, click Wallpaper in the left sidebar, then select a new image from the gallery or upload your own. That's the full process—it takes about 30 seconds. If you want to use a photo from your own files instead of Apple's built-in options, drag it into the preview area and click Set Desktop Picture.

Your Mac stores background images in a few standard places. The easiest route is the Wallpaper section of System Settings, which shows you every image Apple includes with your operating system. You can also point to any photo on your computer—in your Pictures folder, Downloads, or anywhere else—and make it your background without copying or moving the file.

Key Takeaways

  • System Settings > Wallpaper is the official place to change your desktop background on any recent Mac.
  • You can use Apple's built-in image gallery, upload a photo from your computer, or drag an image directly into the preview window.
  • If you want different backgrounds on multiple monitors, each display can have its own image.
  • Your Mac can rotate through a series of images automatically if you choose a folder of photos instead of a single image.

Finding System Settings and the Wallpaper section

Click the Apple menu in the top-left corner of your screen, then select System Settings. On older Macs running macOS Monterey or earlier, this was called System Preferences instead. Once System Settings opens, look for Wallpaper in the left sidebar—it usually appears near the top, sometimes under a Dock or Desktop section depending on your macOS version.

If you don't see Wallpaper listed, scroll down in the left sidebar. On some versions of macOS, it may be grouped under a different heading. Once you find it, click it and you'll see a preview of your current background on the right side of the window, with options to choose a new one below.

Choosing from Apple's built-in image collection

When you open the Wallpaper section, you'll see tabs or categories for different image collections—Dynamic, Light, Dark, and Collections are common names. Click any category to see the images inside it. Each image shows a small preview; click the one you want and it becomes your background when ready.

Dynamic backgrounds are images that change throughout the day to match the time of day or your system appearance settings. Light and Dark collections contain static images designed to work well with your Mac's light or dark mode. Collections usually include themed sets like nature, cities, or abstract designs. Pick whichever appeals to you—you can change it again anytime.

Using your own photos as a background

To use a photo from your computer, click the Add button (usually a plus sign) in the Wallpaper window, or look for an option that says "Select folder" or "Choose image." Navigate to the folder where your photo is stored—your Pictures folder is the most common place—and click the image you want. Click Set Desktop Picture and it becomes your background.

If you have a folder full of photos you'd like to cycle through, select the folder instead of a single image. Your Mac will rotate through all the images in that folder automatically. You can control how often it changes by looking for an option labeled "Change picture" and choosing an interval—every 30 minutes, hourly, daily, or when you wake your Mac are typical choices.

Setting different backgrounds on multiple monitors

If you use an external monitor or multiple displays, each one can have its own background. In the Wallpaper section of System Settings, you'll see a dropdown menu or tabs at the top showing your displays—usually labeled "Built-in Display" or "Display 1" and "Display 2." Click the display you want to change, then choose a new background for it the same way you would for a single monitor.

Your Mac remembers each display's background separately, so if you disconnect an external monitor and reconnect it later, it will show the background you set for it before. This is useful if you dock your laptop with different monitors in different locations.

Troubleshooting when the background won't change

If you click Set Desktop Picture and nothing happens, make sure you're using a file format your Mac recognizes—JPEG, PNG, HEIF, and TIFF all work. If you're trying to use a photo from the internet, save it to your computer first rather than trying to drag it directly from a web browser.

If the Wallpaper option doesn't appear in System Settings, restart your Mac. On very old Macs running macOS versions before Big Sur, the background settings may be in System Preferences under Desktop & Screen Saver instead of Wallpaper. Check your Mac's macOS version by clicking the Apple menu and selecting About This Mac if you're unsure which version you're running.

Frequently Asked Questions

Can I use a photo from my iPhone as my Mac background?

Yes. Use iCloud Photos or AirDrop to send the photo from your iPhone to your Mac, save it to your computer, then set it as your background through System Settings. Alternatively, if you have iCloud Photos enabled on both devices, the photo may already be in your Mac's Photos library and you can access it directly from the Wallpaper section.

What happens to my background if I update macOS?

Your custom background stays in place. If you were using one of Apple's built-in images, it remains your background after the update. The built-in image collections may change or add new options with a macOS update, but your choice is preserved.

Can I schedule my background to change at a specific time?

You can set it to change at regular intervals—every 30 minutes, hourly, daily, or when you wake your Mac—but not at a specific clock time. If you need a background to change at an exact time, you would need to use a third-party app designed for that purpose.

Why does my background look different on my Mac than it did on my iPhone?

Your Mac and iPhone have different screen sizes and aspect ratios, so the same image may be cropped or scaled differently on each device. The Wallpaper section on your Mac lets you adjust how the image is positioned—centered, tiled, or scaled to fill the screen—which can help it look the way you want.