Now that you have created a service that starts the default screen saver, you need to assign a keystroke combination to initiate the service. Save Screen Saver as a service for a keystroke Go to the File menu and choose “Save” naming it something obvious like “Start Screen Saver” Make a screen saver Service in Automator for Mac Use the search box to find “Start Screen Saver” and drag that into the right side panel Launch Automator, found in the /Applications/ directory
Part 1: Create a Screen Saver Automator Service for OS X