1. First go to the "Desktop and screen saver" option in System Preferences.
2. After opening the option, we can see the desktop background setting of Mac system and the screen saver are two different tabs respectively. We can set the left arrow at the desktop background image of the Mac, the system comes with a lot of pleasing scenery, you can also manually add folders to your favorite picture set as the desktop background, you can also set the picture transform time, every time, the system will automatically help you change the desktop background, Isn't it really cool?
3, Next we set up the screen saver, as shown in the red box on the left is the Mac built-in screen saver effect, you can choose your favorite type. The bottom left "idle before starting" is the time to set the Mac to enter the screen saver.
4, Mac screen saver can also choose the source of the demonstration content, in the "source" above, we can choose their favorite pictures for screen saver demonstration.