Unsplash Wallpapers for Mac (Official) - Curated, HD desktop background photos from Unsplash.
Videvo - Free HD stock footage & motion graphics for any project!
Irvue - (previously Unsplash Wallpaper) Gorgeous wallpapers on your Mac.
Coverr - Beautiful free stock videos for any use
Wallpaper Wizard - Wow-worthy backgrounds for Mac
Mixkit - High-quality stock videos that are completely free.