How do I turn off the Screen Saver? Can't believe that I have to ask this question, but...

How to I disable the screen saver on my 2014 MacBook Pro, running MacOS Sierra 10.12?

I have a need occasionally to keep the screen display on, but I might not use it for 20 minutes at a time. I want to disable the screen saver, but the button to adjust the time (I presume it has a 'None' option) is disabled.



How can I enable that dropdown, in order to change the 'Start after' time? Or is there somewhere else I should change it?

I know that I can use hot corners to disable screen saver, but that's too hacky - if I forget to put the cursor in the corner, it doesn't do it, and I only know when the screen saver comes on - which is frustrating.
Check out this discussion: Screensaver &quot;start time&quot; option grayed out


The system administrator has probably set the screensaver timeout in a user profile. You can't change it without removing the profile, which will probably cause you to lose network access.

Check if you have a profile (overriding your personal settings) by Apple &gt; System Preferences &gt; Profiles




(&quot;Profiles&quot; is in the bottom right)


if you have a profile, one of these files has its settings: ~/Library/Preferences/ByHost/ look for a file with a long name that begins &quot;com.apple.screensaver&quot;. There may be two such files. Move the one without the word &quot;slideshow&quot; in the name to the Trash.


It most probably applies to your problem too...