Stay focused with Dark Mode. You can use a dark color scheme for the desktop, menu bar, Dock, and all the built-in macOS apps. Dark Mode is finely tuned for professionals who edit photos and images—colors and fine details pop against the dark app backgrounds. But it’s also great for anyone who just wants to focus on their content. Your content stands out front and center while darkened controls and windows recede into the background. See white text on a black background in apps such as Mail, Contacts, Calendar, and Messages, so it’s easier on your eyes when you’re working in dark environments.
Use a dynamic desktop. When you use a dynamic wallpaper, the picture automatically changes to match the time of day in your location. Click Wallpaper in the sidebar in System Settings, then choose a dynamic wallpaper. To have your screen change based on your time zone, turn on Location Services. If Location Services is turned off, the picture changes based on the time zone specified in Date & Time settings.
Night Shift. Switch your Mac to warmer colors at night or in low-light conditions to reduce your exposure to bright blue light. Blue light can make it harder to fall asleep, so warmer screen colors may help you get a better night’s rest. You can schedule Night Shift to turn on and off automatically at specific times, or set it to come on from sunset to sunrise. In System Settings, click Displays, click the Night Shift button at the bottom, then set your options. Drag the slider to adjust the color temperature.