If you are worried about having a high-resolution monitor but no high-resolution desktop photos, Wallpaper Wizard is the best choice for you. Because there are more than 25000 images in Wallpaper Wizard, all of which are in 4K quality.
Wallpaper Wizard allows you to have enough fresh wallpapers for the whole lifetime of your Mac. Choose from hundreds of HD-selected desktop images, and the app will set a new background for you every week, every day, or every hour. Finally, you can eliminate the hassle of sifting through Google images.