The simplest way to change your Mac wallpaper

Open System Settings, click Wallpaper in the sidebar, then pick a new image from the gallery or upload your own. That's the whole process — it takes about 30 seconds. Your Mac comes with dozens of built-in images organized by category, and you can also use any photo from your computer or a folder you create.

If you want different wallpapers on different spaces or monitors, or if you want the image to change automatically throughout the day, those options are in the same menu. The rest of this guide walks through each choice and explains what happens when you make them.

Key Takeaways

  • System Settings is where you change wallpaper on any Mac — click Wallpaper in the sidebar and select an image from the gallery or your own files.
  • Built-in images are organized by category (Nature, Solid Colors, Abstract) and update with each macOS version, so you have new options after system updates.
  • You can set different wallpapers for each space or monitor if you use multiple displays or virtual desktops.
  • Dynamic wallpapers change throughout the day automatically, and some built-in images offer this feature.
  • Any image file on your Mac — a photo, a screenshot, a downloaded picture — can become your wallpaper.

Opening System Settings and finding the Wallpaper menu

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, but the process is the same.

Once System Settings opens, look for Wallpaper in the sidebar on the left. Click it. If you don't see Wallpaper listed, scroll down in the sidebar — it's usually near the bottom, below Siri and below Accessibility. The main panel on the right will show your current wallpaper and a gallery of options below it.

Choosing from the built-in image gallery

The gallery shows categories like Nature, Solid Colors, Abstract, and Landscapes. Click any category to see the images inside. Hover your mouse over an image to see a preview of how it will look on your screen. Click the image once to explore it when ready — there's no confirm button, and the change happens right away.

Some built-in images have a small icon in the corner that looks like a sun or a moon. These are dynamic wallpapers, which means they change throughout the day. If you select one, your wallpaper will shift from morning colors to afternoon colors to evening colors automatically, even if you never touch the settings again.

The built-in gallery updates when you install a new version of macOS, so you'll have fresh options to choose from after system updates. If you've used the same wallpaper for years and want something new, checking System Settings after an update is a quick way to find it.

Using your own photos or downloaded images

To use a photo from your Mac instead of a built-in image, click the plus sign (+) at the bottom of the Wallpaper panel. A file browser will open. Navigate to the folder where your image is stored — usually Pictures, Downloads, or a folder you created yourself — and click the image file. Click Open, and it becomes your wallpaper.

You can also drag an image file directly from Finder onto the wallpaper preview at the top of the System Settings panel. This is faster if the image is already visible on your desktop or in a Finder window.

Any common image format works: JPG, PNG, HEIF, or TIFF. If you have a screenshot you want to use, it's already saved in your Pictures folder by default. Downloaded images from the web are usually in your Downloads folder.

Setting different wallpapers for different spaces or displays

If you use multiple virtual desktops (called spaces on a Mac) or if you have more than one monitor connected, you can set a different wallpaper for each one. In the Wallpaper panel, look for a dropdown menu that says "All Displays" or shows the name of your current space. Click it to see your options.

Select the specific space or display you want to change, then pick a new image from the gallery or upload your own. That wallpaper will now appear only on that space or monitor. When you switch to a different space or look at a different monitor, you'll see its own wallpaper.

This is useful if you use different spaces for different work — for example, one space for email and one for design — and you want a visual reminder of which space you're in. It's also helpful if you have an external monitor and want a different image on each one.

Removing a wallpaper or returning to the default

To go back to the default wallpaper that came with your Mac, open System Settings, click Wallpaper, and select the image labeled "Default" or "Big Sur" (or whatever your macOS version is called). This is usually in the Solid Colors or main gallery section.

If you uploaded a custom image and want to remove it from the gallery, right-click the image in the Wallpaper panel and select Delete. This removes it from the wallpaper menu but does not delete the original file from your Mac — it's still in whatever folder you stored it in.

Troubleshooting when wallpaper won't change

If you click an image and nothing happens, check whether your Mac is locked or in sleep mode. Wake it up by moving the mouse or pressing a key, then try again. Sometimes the change takes a few seconds to appear, especially if the image is very large.

If you're using a custom image and it appears stretched, blurry, or cut off, the image resolution may not match your screen. Try a different image first to see if the problem is specific to that file. If it is, you can resize the image in Preview (open the image, click Tools, then Adjust Size) before setting it as wallpaper.

On very old Macs, System Settings may not have a Wallpaper option in the sidebar. Instead, look for Desktop & Screen Saver in System Preferences. The process is the same — click the Desktop tab, then choose an image from the gallery or click the plus sign to upload your own.

Frequently Asked Questions

Can I use a live photo or video as my wallpaper?

No. Wallpapers on Mac must be still images — JPG, PNG, HEIF, or TIFF files. You can use a screenshot from a video or a frame from a live photo, but the wallpaper itself will be static. Some built-in dynamic wallpapers change throughout the day, but they're not videos — they're pre-made image sequences.

What size image works best for my wallpaper?

Your Mac will scale any image to fit your screen, so size doesn't matter as much as aspect ratio. A landscape image (wider than it is tall) usually looks better than a portrait image (taller than it is wide) on a desktop. If the image is very small, it may appear blurry when stretched to fill your screen.

Will changing my wallpaper slow down my Mac?

No. Wallpaper is just a background image and has no effect on performance. Even dynamic wallpapers, which change throughout the day, use very little processing power. You can change it as often as you want without any impact on speed.

Can I set the wallpaper to change to a random image every time I restart?

Not through System Settings directly. However, you can create a folder of images you like, set one as your wallpaper, and manually pick a different one each time you want a change. Some third-party apps offer automatic rotation, but the built-in Mac tools do not.

Does my wallpaper choice affect my login screen?

No. Your login screen wallpaper is separate from your desktop wallpaper. The login screen uses the default image for your macOS version and cannot be changed through System Settings. Some third-party tools claim to change it, but they require additional software and are not officially supported by Apple.