Apple unveiled macOS Mojave with plenty of new features and improvements at its opening keynote of WWDC 2018 yesterday. Soon after the keynote, the company also dropped the first developer beta of the OS for interested developers and beta testers.
While most users are likely going to hold out on installing Mojave on their Mac due to stability issues, you can at least enjoy the new Mojave wallpapers on your Mac or iPad/iPhone right away. At least, the wallpapers will give you a feel of using Mojave albeit without all of its features. Since macOS Mojave comes with Dark Mode, Apple has also included two different wallpapers on it. The OS will automatically switch to the dark variant of the stock wallpaper when Dark Mode is activated for that perfect look.
You can download the day and night wallpapers from here and here, respectively. They are extremely high-resolution wallpapers so you can use them on your iMac Pro, Retina MacBook Pro, iPad or any other device without worrying about its quality.