Turn off Dark mode in Safari and preview
I'm running Sierra 10.12.6 on my Mac. Somehow my safari was changed to dark mode, I'd like to change that. AND when I open a file with Preview or PowerPoint, I am looking at solid black screens. I assume the 2 are related. Looking at online forums, the fix is to go to System Preferences\General and turn off Dark Mode. I do not have a dark mode option under General tab with Sierra.
thanks for your help!!
iMac 27″, macOS 10.12