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 ?

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File opened with Safari which is perfect:

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  • 1
    i'm so perplexed that this is not a bigger topic! All previews of transparent PNGs, specifically data plots, are ruined with this?? Did you figure out a way? Mar 20, 2020 at 16:07
  • @K.-MichaelAye, didn't figure out any way since then...
    – JKHA
    Mar 27, 2020 at 21:02
  • Have the same issue. Very frustrating.
    – Luke Davis
    Feb 24, 2021 at 3:20

1 Answer 1


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

  • Welcome to Ask Different. Can you elaborate on how to change the default color in Preview? The link you provide in your answer simply links to the question.
    – jaume
    Oct 2, 2020 at 10:23

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