打開系統(tǒng)設(shè)置，點擊側(cè)邊欄的桌面與屏幕保護(hù)程序；2. 選擇內(nèi)置壁紙、照片或自定義文件夾中的圖片；3. 點擊圖片即可設(shè)置為背景，或通過加號添加個人圖片文件夾；4. 可調(diào)整圖片顯示方式如填充屏幕、居中或平鋪；5. 支持設(shè)置幻燈片放映自動更換背景，整個過程只需幾步即可完成個性化桌面背景的更換。

Changing the desktop background on a Mac is simple and lets you personalize your workspace. Here’s how to do it step by step.

Open System Settings

Click the Apple logo (?) in the top-left corner of your screen, then select System Settings (or System Preferences on older macOS versions). In the sidebar, click Desktop & Screen Saver.

On macOS Ventura and later, it’s labeled Desktop & Screen Saver. On earlier versions, it might just say Desktop.

Choose a Background Image

You’ll see a preview of your current desktop and a list of image categories on the left, such as:

• Apple Wallpapers (built-in collections like Mojave, Big Sur, etc.)
• Photos (images from your Photos app)
• Solid Colors (plain color backgrounds)
• Folders you’ve added (custom folders with your own images)

Click on any category, then select an image to instantly set it as your background.

Use Your Own Photo

To set a custom image:

• Click the button below the image thumbnails (or drag a folder into the list).
• Navigate to the folder where your image is saved (like Downloads or Pictures).
• Select the folder — now you can choose any photo inside it.
• Click the image you want, and it becomes your desktop background.

You can also just drag and drop an image file directly onto the desktop, then right-click it and choose Change Desktop Background.

Adjust Display Options

Below the image preview, you’ll see settings like:

• Fill Screen
• Fit to Screen
• Stretch
• Center
• Tile

Choose one depending on how you want the image to appear. “Fill Screen” is usually best — it scales the image to cover the entire desktop without distortion.

You can also check Change picture to rotate through a slideshow if you select a folder or album.

That’s it — your Mac’s desktop background is now updated. Basically just a few clicks, and you can switch it up anytime.

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