Open General preferences for me
Select Light, Dark, or Auto.
Light is a light appearance that doesn’t change.
Dark is a dark appearance that doesn’t change. Dark Mode darkens the color scheme so the content you’re working on stands out, while windows and controls seem to recede into the background. It’s effective for viewing documents, presentations, photos, movies, webpages, and more.
Tip: You can quickly turn Dark Mode on or off in Change General preferences on Mac