The quickest way to change your MacBook background

Open System Settings, click Wallpaper, then select a new image from the gallery or upload your own. The change takes effect immediately on your desktop and lock screen. The whole process takes under a minute.

If you want to use a photo you already have on your computer, you can drag it directly into the wallpaper picker instead of browsing the built-in collection. MacOS will automatically crop it to fit your screen size.

Key Takeaways

  • System Settings > Wallpaper is the only place you need to go to change your background on a MacBook.
  • You can choose from Apple's built-in wallpaper collection or upload any image file from your computer.
  • Changes apply to both your desktop and lock screen at the same time unless you customize them separately.
  • Your MacBook can rotate through multiple wallpapers on a schedule if you enable the option in Wallpaper settings.

Step-by-step: changing your desktop background

Click the Apple menu in the top-left corner of your screen, then select System Settings. In the sidebar, scroll down and click Wallpaper. A panel will open showing thumbnail previews of available wallpapers organized by category — Dynamic, Still, Collections, and Photos.

Click any wallpaper to preview it on your screen. If you like it, click Set Desktop Picture at the bottom right. The image will appear on your desktop immediately. If you want to change your lock screen separately, click the dropdown menu at the top of the Wallpaper panel and select Lock Screen before choosing a different image.

Using your own photos as a background

To use a photo stored on your computer, open System Settings and go to Wallpaper. In the left sidebar, click Photos, then select the album or folder where your image is saved. Your photos will appear as thumbnails. Click the one you want and then click Set Desktop Picture.

You can also drag an image file directly from Finder into the wallpaper preview area. MacOS will automatically resize and center the image to fit your screen. If the photo is smaller than your screen resolution, it may appear blurry or pixelated — using a high-resolution image (at least 2560 x 1600 pixels) will give you the sharpest result.

Setting different backgrounds for desktop and lock screen

By default, the same wallpaper appears on both your desktop and lock screen. To use different images, open System Settings and go to Wallpaper. At the top of the panel, click the dropdown menu and select Lock Screen. Choose a wallpaper for your lock screen, then click Set Lock Screen Picture.

Next, click the dropdown again and select Desktop to choose a separate image for your desktop. This way you can have one background visible when your Mac is locked and a different one when you are using it. You can change either one at any time by returning to this same menu.

Scheduling automatic wallpaper changes

If you want your background to change automatically throughout the day, open System Settings, go to Wallpaper, and select a Dynamic wallpaper from the gallery. Dynamic wallpapers shift their appearance based on the time of day — they show different colors and lighting at sunrise, midday, sunset, and night.

For a rotating collection of images, click Wallpaper in System Settings, select a collection (such as Aerial or Nature), then look for the option that says "Change picture." You can set it to change every hour, every day, or when you wake your Mac from sleep. This setting applies to whichever wallpaper you have selected.

Troubleshooting common wallpaper problems

If a wallpaper does not appear after you set it, restart your Mac. Sometimes the display does not refresh properly until you do. If you uploaded a personal photo and it looks stretched or cut off, the image may be a different aspect ratio than your screen. Try cropping it to match your screen size before uploading it again.

If System Settings crashes when you try to open Wallpaper, restart your Mac and try again. If the problem continues, check that you have the latest macOS update installed by going to System Settings > General > Software Update. Older versions of macOS sometimes have bugs in the wallpaper feature that newer updates fix.

Frequently Asked Questions

Can I use a video or animated GIF as my wallpaper?

No. MacOS only supports still images and Dynamic wallpapers, which are built-in animated backgrounds. You cannot use video files or GIF animations as your desktop background. Dynamic wallpapers are the closest option if you want movement on your desktop.

Will changing my wallpaper affect my files or settings?

No. Changing your background is purely visual and does not touch any files, applications, or system settings. You can change it as many times as you want without any risk to your data or Mac performance.

What image formats work for uploading my own photos?

JPG, PNG, HEIF, and TIFF files all work. Most photos from your camera or phone are already in one of these formats. If you have an image in a different format, you can convert it using Preview (built into macOS) or any free online converter.

Can I set a different wallpaper for each monitor if I have multiple displays?

Yes. Open System Settings, go to Wallpaper, and at the top you will see a dropdown showing each connected monitor. Select one monitor, choose a wallpaper, and click Set Desktop Picture. Repeat for each monitor to give them different backgrounds.