MacOS Mojave and Dark Theme - Preview for .png file with transparent background not white Not surprisingly at all, with MacOS Mojave and Dark Theme OS Mode, Preview displays transparent background with gray. How can I set it to be white only for preview but keeping MacOS Dark Mode ? 



File opened with Safari which is perfect:
The is to change the default coulor scheme for your dark mode in preview.
MacOS Mojave and Dark Theme - Preview for .png file with transparent background not white