If I download that CR2 raw file I get the same scrambled image, load it into Lightroom, and for a moment it previews the file correctly (and looking in finder the jpeg preview is fine), but the RAW file itself is corrupted.
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When you are opening them on the XP or iMac are you actually opening them, or just viewing the JPEG preview?
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When you are opening them on the XP or iMac are you actually opening them, or just viewing the JPEG preview? I think you are just seeing the JPEG preview embeded in the raw file, but not actually viewing the file corrupted file itself.
I think you could have a bad card and it's corrupting your RAW files. Try formatting the card and see if it is any better. Or if it is a no name card, I'd invest in a Lexar or Sandisk card. I've always stuck to Sandisk cards over the last few years, various cards, never had any corrupted images.
I don't think it is a raw support issue.
If I download that CR2 raw file I get the same scrambled image, load it into Lightroom, and for a moment it previews the file correctly (and looking in finder the jpeg preview is fine), but the RAW file itself is corrupted.
When you are opening them on the XP or iMac are you actually opening them, or just viewing the JPEG preview?
I think you could have a bad card and it's corrupting your RAW files. Try formatting the card and see if it is any better. Or if it is a no name card, I'd invest in a Lexar or Sandisk card. I've always stuck to Sandisk cards over the last few years, various cards, never had any corrupted images.