But what is it actually opening? I believe it is opening the jpeg preview stored with the DNG. Is this true or does Preview support DNG an RAW natively somehow? The particular image I opened, just to try it, looked brighter and more saturated than opening the same image in a converter.
MacOS can render some DNG files (only for cameras that it knows about, which doesn't make sense) natively.
If they opened the JPEG preview, it would be very low res.
Um ok, it was DNG converted from a Leica RAW. I suppose Apple has heard of Leica.