Change Screen Saver preferences on Mac
On your Mac, use the Screen Saver pane of Desktop & Screen Saver System Preferences to make images appear on the screen when you aren’t using your Mac. You may want to do this to hide your desktop while you’re away.
To change these preferences, choose Apple menu > System Preferences, click Desktop & Screen Saver, then click Screen Saver.
List of screen savers
Select a screen saver on the left, then do one of the following on the right, depending on your choice:
Click the “Start after” pop-up menu, then choose how long your Mac can be inactive before the screen saver starts. If you don’t want a screen saver to start, choose Never.
Show with clock
Display the time with the screen saver.
Use random screen saver
Let macOS choose which screen saver to use.
Start or stop the screen saver when you move the pointer to a screen corner.
Click the pop-up menu for a corner, then choose Start Screen Saver or Disable Screen Saver.
To use a modifier with the hot corner, press and hold the Command, Shift, Option or Control key, or a combination of these keys, while viewing the pop-up menus.
Tip: Want to see how a screen saver looks full screen? Select a screen saver from the list, move the pointer over it on the right, then click Preview. To stop the screen saver and return to the preference pane, just move the pointer.