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  1. #1

    Member Since
    Jan 22, 2010
    Files Have No Compression When Zipped
    I'm trying to compress an image file that is 14.7 MB in size, but the compression programs I've used all keep the file at the same size after it has become a zip file. The options I've tried include the "compress" option built into the Mac OS X, as well as WinZip for Mac.

    When I check the Get Info window for the original and zipped file, they both indicate the same file size: 14.7 MB. I've also tried compressing larger files and the results are similar - compression on the zip file is little if any.

    Why is this happening and how can I actually compress my image file?
    Thanks for any tips.

  2. #2

    Bob_Stan's Avatar
    Member Since
    Jun 17, 2011
    Mac Pro 3.5 Ghz 6 Core XEON, 1TB SSD,64GB . MBPro 2.2Ghz 480GB SSD, 500GB HD, 16GB
    What is the file format of the image file?

  3. #3

    Dysfunction's Avatar
    Member Since
    Mar 17, 2008
    Tucson, AZ
    Way... way too many specs to list.
    if it's jpg, it's already compressed.
    This machine kills fascists
    Got # ? phear the command line!

  4. #4

    Raz0rEdge's Avatar
    Member Since
    Jul 17, 2009
    27" i7 iMac, 15" Macbook Pro TB, 13" Macbook Air, iPhone 6S, iPod Nano 7th Gen
    Not everything compresses to a smaller size..text files compress REALLY well..but a lot of other formats are already in their compressed form and will not compress any further, in fact the resulting ZIP file might actually be bigger than the original file.

    Why bother compressing a single 14.7MB file? If you're trying to fit it as an attachment in e-mail or something, you might want to split the file instead to make it work..
    Mac-Forums is shutting down in the near future. Read this thread to learn more.


  5. #5

    Member Since
    Jan 22, 2010
    The image is in jpg format, so it sounds like its already in its lowest level of compression. Thanks.

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