The Dynamic Distraction
macOS features a visually impressive system called “Dynamic Desktop.” When you select one of Apple’s default landscapes (like the Mojave Desert or the Monterey coastline), the operating system automatically links the wallpaper to your system clock and physical location. As the day progresses, the wallpaper slowly shifts. At noon, the desert is bathed in bright sunlight; by 8 PM, the same image transitions into a dark, starlit night. While it is a beautiful technical showcase, it can be distracting for creative professionals who need a perfectly consistent background color to accurately judge the contrast of the photos or videos they are currently editing.
Locking the Scenery
To establish a consistent visual baseline and stop macOS from automatically changing the desktop wallpaper based on the time of day, you must force the system to use a static version of the image.
Click the Apple logo in the extreme top-left corner of your screen and select System Settings from the dropdown menu. In the left-hand navigation sidebar, scroll down and click on Wallpaper. You will see a preview of your current desktop background. If you are using an Apple-provided dynamic image, look immediately below the main preview image. You will see a dropdown menu that is likely set to Dynamic or Automatic. Click this dropdown menu. To freeze the image in its bright daytime state permanently, select Light (Still). To freeze it in its dark nighttime state permanently, select Dark (Still). The wallpaper will instantly lock into that specific lighting condition and will never shift again, regardless of what the clock says.