I have a new Mojave (10.14.1) installation on an iMac (Retina 5K, 27-inch, 2017). My screen saver is set to start after 5 minutes. I have a hot corner defined to start the screen saver.

I have noticed that periodically, the screen saver just starts up out of the blue. Typically this happens while I am scrolling with the magic mouse. I am definitely not hitting the hot corner.

Any suggestions for why this is happening and how to stop it?

  • 1
    You could eliminate the hot corner from the list of possibles by either adding a Cmd key to the corner, or just removing that corner temporarily. – Tetsujin Jan 11 '19 at 14:15
  • Try a reboot of the computer – user310476 Jan 11 '19 at 15:13

It turns out another Mac had an idle screen sharing session open to this computer. After closing that, I have not experience the screen saver start.

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