For optimal effect you will want somewhere between 10 and 25 images that are of the same general scene or landscape. If you’re creative with Pixelmator or Photoshop you can make them yourself, you can download collections of them found on the web (as we’ll do in this tutorial with images from Mojave default wallpaper), you create these yourself with Time Lapse photography on iPhone or iPad, or you can compile your own collection of images on your own – just make sure the pictures have file names that are labeled sequentially in the order of how you want them to show up (file1, file2, file3 etc). To mimic Dynamic Desktops on any version of Mac OS, you will need a collection of wallpapers that are of the same scene but have different lighting or colors. But you actually don’t need macOS Mojave (whether in public beta or otherwise) to gain a Dynamic Desktop feature on the Mac, and you can accomplish a very similar effect by using existing features available to every version of Mac OS system software.

Mac os mojave dynamic desktop