Here are the mime types for a few popular image format including the ICNS image/icon file. If you’re wondering what you need to set the mime type as, as I was, then I believe you’ll be pleased to learn that the standard mime type should be set as `image/icns`. If you have thoughts otherwise leave me a comment below.
Here’s the table:
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# Image file formats
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*.png = image/png
*.jpg = image/jpeg
*.gif = image/gif
*.tif = image/tiff
*.bmp = image/bmp
*.icns = image/icns
