I have macOS 10.13.6 running on my MacBookPro (15-inch, 2017). I went into Energy Saver and set "Turn display off after:" to 1.5 hours. I went into "Screen Saver" and set it to start after 20 minutes. When I press the lock icon on my TouchBar, the computer locks, and then within 5 seconds the displays turn off. As a result, the screen saver never kicks in... But I'd like to see the screen saver on the lock screen.
I ran a web search for the problem and found mention of a "com.apple.screensaver" plist file but this file doesn't appear to exist in /Library/Preferences, which is where it is supposed to exist. I suppose this file has been renamed or something similar, for this OS release...
So I'm grasping at straws now. How can I enable the screen saver on the lock screen?