screen turns dark rather than screen saver
Hello all -
I am running High Sierra10.13.6 on my mid-2011 iMac. My problem is that the screen saver never comes on. In the Screen Saver window within System Preferences, I have selected Ken Burns=>Cosmos. The sample window comes up nicely with the Cosmos images. I selected 20 minutes as the 'Start after' time.
However, before the 20 minutes of inactivity, the screen goes black, and I never see the screen saver. I tap one of the keyboard's control keys and after a few seconds my re-login screen appears and I go from there.
What's happening? Am I missing something else I could/should be setting?
Thanks in advance for any thoughts -
-TheOldFart
iMac 21.5", macOS 10.13