iMac, 10.14.3 I have the screen saver set for a certain time and it never goes on when it should. I've chosen several different times and none of them set the screen saver to go on. Just now I had it set for 1 minute and it went on after 20 minutes. Plus..it's never the screen saver I chose. I try to log out and wait. That doesn't do it. Then I put it to sleep and that doesn't do it, either. My iMac isn't even one year old! Apple support tried to help me. It worked once and then later it started doing the late start again. Any suggestions?