Caffeinate : prevent screensaver (Catalina) I'm running this terminal command on Catalina hoping to keep the system awake and prevent the screensaver to start (without having to disable the screensaver in system preference).
caffeinate -d -i -u -s -t 39600

I might have added too much parameter and misunderstood them but it's don't seems to work?
Also, I assume the terminal window need to remain open?
Thanks in advance.
Frame challenge…
Why not just use the Hot Corners in the Screen Saver prefs instead.

Push the cursor into the top left &amp; no more screen saver, which will also keep the Mac awake.