The fastest 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. The change takes effect immediately on your desktop and lock screen. The whole process takes less than a minute.
If you want to use a photo you already have on your Mac, you can drag it directly into the wallpaper picker instead of browsing the built-in gallery. Mac also lets you set different backgrounds for different spaces if you use multiple desktops, and you can schedule automatic background changes throughout the day.
Key Takeaways
- System Settings > Wallpaper is the main control panel for changing your desktop and lock screen backgrounds on any Mac.
- You can use Apple's built-in image gallery, upload your own photos, or drag files directly into the wallpaper picker.
- Mac can automatically rotate through multiple images on a schedule you set, or change the background when you switch between different desktops.
- The same wallpaper setting controls both your desktop and lock screen unless you choose to set them separately.
Opening System Settings and finding 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, but the location is the same. Once System Settings opens, look for Wallpaper in the left sidebar — it usually appears near the top, sometimes under a section labeled "Appearance" depending on your macOS version.
If you don't see Wallpaper in the sidebar, scroll down to find it. Once you click Wallpaper, the main panel on the right will show your current background and a gallery of options below it. This is where you make your choice.
Choosing from Apple's built-in image collections
The wallpaper panel displays several collections: Dynamic (images that change based on time of day), Light and Dark (solid colors and simple designs), and Collections (organized by theme like Nature, Landscapes, or Abstracts). Click any collection to see the images inside it, then click the image you want to use. Your desktop updates immediately.
Dynamic wallpapers are popular because they shift throughout the day — for example, a landscape that shows sunrise in the morning and sunset in the evening. If you prefer a static image that never changes, choose from the Light, Dark, or Collections categories instead. You can preview how an image will look before you select it by hovering over it.
Using your own photos as a background
To use a photo stored on your Mac, click the plus sign (+) at the bottom of the wallpaper panel, then navigate to the folder where your photo is saved. Select the image and click Open. Your photo is now added to your wallpaper options and set as your current background.
Alternatively, you can drag a photo directly from Finder into the wallpaper panel without using the plus button. This is faster if you already have the photo open or visible. Mac will automatically resize and position your photo to fit your screen, so you don't need to edit it first.
Setting different backgrounds for your lock screen and desktop
By default, the same image appears on both your desktop and lock screen. If you want them to be different, click the image preview at the top of the wallpaper panel, then select "Customize" (or look for a button labeled "Set Lock Screen" or similar, depending on your macOS version). This opens a second panel where you can choose a separate image for your lock screen only.
After you set a lock screen image, your desktop background remains whatever you chose first. You can change either one independently at any time by returning to System Settings > Wallpaper and selecting the image you want.
Scheduling automatic background changes throughout the day
If you want your background to rotate automatically, look for a dropdown menu in the wallpaper panel labeled "Change picture" or "Auto-rotate." Select how often you want the change to happen — options usually include every 30 minutes, hourly, daily, or when you wake your Mac. Then choose whether you want Mac to cycle through a specific collection or a folder of your own photos.
This feature works best with Dynamic wallpapers or with a folder containing many images. If you set it to change every 30 minutes, Mac will move to the next image in the collection at that interval. You can turn off auto-rotation at any time by setting the dropdown back to "Never" or "Don't change."
Using different backgrounds on different desktops or spaces
If you use multiple desktops (also called Spaces), you can assign a different background to each one. Set your background as usual in System Settings, then switch to a different desktop using Mission Control or by swiping with four fingers on your trackpad. Return to System Settings > Wallpaper and select a new image — this one will apply only to the current desktop.
Each desktop remembers its own background independently. This is useful if you organize your work by project or task and want visual separation between spaces. You can have as many different backgrounds as you have desktops.
Frequently Asked Questions
Can I use a photo from the internet as my background?
Yes. Right-click the image in your web browser, select "Save Image As," choose where to save it on your Mac, then use the plus button in System Settings > Wallpaper to add it. Alternatively, drag the image directly from your browser into the wallpaper panel.
Why does my background look blurry or stretched?
Mac automatically scales images to fit your screen, which can distort photos that don't match your display's aspect ratio. For best results, use images that are at least as wide and tall as your screen resolution. You can check your resolution in System Settings > Displays.
Can I set a background that only appears on my lock screen?
Yes. In the wallpaper panel, look for an option to customize your lock screen separately from your desktop. Click the preview image and select "Set Lock Screen" to choose a different image for that screen only.
What if I want to go back to the default Mac background?
Open System Settings > Wallpaper and select any of the built-in Apple images from the collections. The default backgrounds are usually in the Light, Dark, or Dynamic categories. Click one to restore it.
Does changing my background affect my Mac's performance or battery life?
No. Static images have no impact on performance. Dynamic wallpapers use slightly more resources than static ones, but the difference is negligible on modern Macs and will not noticeably affect battery life on laptops.