The specific method is as follows:
1. Right-click the desktop and select Change Background;
2. Select the background below the directory that has been included in the system, which is the wallpaper you see;
3, you can also choose the way to fill the screen, similar to WINDOWS.
4. Increase the directory where you store your own wallpaper. Add a directory to see your wallpaper, as shown below, and then select the wallpaper you added, and the desktop background will be updated immediately.
Changing wallpaper in Apple mac system is not very complicated. As long as you master the method, you can easily change wallpaper pictures.