A friend of mine who uses a Mac gave me a whole raft of .jpg files on a thumb drive (which appears to be formatted as FAT32). I can't open them on any app on my Windows 10 PC, including Windows Photos or Photoshop. I get "it appears we don't support this file format" in Windows Photos
When I look at them in a hex editor they are very different from the normal JPEGs on my PC from Photoshop or my cameras. My normal JPEGs all start with FF D8 FF ... and then Exif or JFIF data starts around 06. But in the unreadable ones from the Mac there is no FF D8 FF and where I expect to see the Exif data it says "Mac OS X". Are JPEG files on a mac "different"? or what am I seeing here?