macOS Sierra sees boxed question marks on files saved by Windows on USB

Discussion in 'macOS Sierra (10.12)' started by GiddeliMac, May 30, 2017.

  1. GiddeliMac macrumors newbie


    Jun 21, 2013

    I saved the files shown above on a USB drive that has been ExFAT-formatted. The files were saved to it while I was using a Windows 10 PC. After I saved them, I tried to open them on my iMac (macOS Sierra Version 10.12.5). I could not. And I noticed the boxed question marks.

    I deleted the files, re-formatted the USB drive as ExFAT, and plugged the USB into the Windows 10 PC, saving the files to the USB drive again.

    When I plugged the USB back into my iMac to view the files, I saw the boxed question marks again.

    Could it have something to do with the way Windows 10 is saving the files to the USB drive? Or is it something with the way macOS Sierra is reading the files? Is ExFAT still a good format to use for USBs used on Windows and macOS?

    Note the "exec" thumbnails that Finder is showing me. Could that be a helpful clue?

    I hope so, because I am clueless about this...
  2. Stefan johansson macrumors 65816

    Stefan johansson

    Apr 13, 2017
    Windows .exe files,and parts of them,cannot run with macOS. The images are most likely parts of windows installation files.
  3. allan.nyholm macrumors 6502a


    Nov 22, 2007
    Aalborg, Denmark
    ExFat has quite a few issues when files on such is moved back to the Mac. Many macOS specific files are destroyed. I suggest not using it. I don't have any other solutions other than to compress your files using RAR or 7Zip before copying back and forth.
  4. GiddeliMac thread starter macrumors newbie


    Jun 21, 2013
    They are image files that I downloaded from the internet, so I don't think that is the problem.

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3 May 30, 2017