In this video I go through how you can use dark mode on Mac. I will explain what it is and how you can activate it on your Mac.
From Apple:
Dark Mode makes it easier to stay focused on your work, because your content stands out while darkened controls and windows recede into the background.
Dark Mode is a dramatic new look that's easy on your eyes and helps you focus on your work. Dark Mode uses a dark colour scheme that works system-wide, including with the apps that come with your Mac. And third-party apps can adopt it, too.