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.