: The original "Retina Wide" version is available in 3840x2400 pixels, which follows a 16:10 aspect ratio common to MacBook displays.
Type /Library/Desktop Pictures to see all pre-installed Apple wallpapers. 3840x2400 macOS Sierra Stock Mountains 4K Wallp...
Alternatively, you can download high-quality versions from repositories like HDWallpapers.in or 4KWallpapers.com . : The original "Retina Wide" version is available