By Apple's documentation, QLThumbnailProvider is used to generate thumbnails for custom file types. However i am trying to use it to generate thumbnails for public.image file type and it is not working. So can we override the system supported thumbnailer using QLThumbnailProvider?
Unable to generate thumbnail for public.image using QLThumbnailProvider in macOS app?
So can we override the system supported thumbnailer using
QLThumbnailProvider?
It’s been a while since I looked at this — before the advent of QLThumbnailProvider in fact — but at that time it was impossible to override the built-in support. I wouldn’t expect that to have changed.
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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
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