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Verifying the integrity of downloaded installer files (1537)

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  • Verifying that the downloaded file from VMware is not corrupted
  • Unable to mount the .DMG image file in Mac OS
  • You see this error:

    file_name is not a valid win32 application


After downloading an installer file or disc image (.ISO), you can use the MD5 sum value to verify the integrity of the download. VMware provides the correct MD5 sum on the download page for each file. Compare the MD5 sum output generated with the value posted on the VMware website. If the values do not match, download a new copy of the file as the one you have is corrupted or incomplete.


Windows does not provide a built-in utility for generating MD5 sum values. You can download an add-on as per the Microsoft Knowledge Base article 841290.
You can also obtain a third-party utility to do this. Perform the steps provided with the utility to generate the MD5 sum value. An available third-party utility is MD5: Command Line Message Digest Utility.

Mac OS

To correct this issue in Mac OS:

  1. Start the Terminal application
  2. Type md5 and do not press Return.
  3. Press the space bar.
  4. Drag the downloaded file onto the Terminal application window. The filename is appended to the command.
  5. Click the Terminal window, and press Return.
  6. The MD5 value is generated.
If the file continues to fail to mount:
  1. Repair the disk permissions. For more information, see Disk Utility 12.x: Repair disk permissions.
  2. Right-click or control-click the file. Click Open With > DiskImageMounter.

Linux / ESX

The ESX service console and most Linux distributions include the command-line utility md5sum.

To correct this issue in Linux/ESX:
  1. To check multiple files at once, create a new text file containing all the MD5 values you want to verify with the format:

    <md5_sum_value> <file_name>

  2. Save the file as sums.md5
  3. Run this command to generate and check the MD5 sum values in the text file:

    md5sum -c sums.md5
Tip: To verify the MD5 sum of a CD-ROM disc, type md5sum /dev/cdrom and press Enter.

Additional Information

For more information, see Using MD5 Checksums .

Note:The preceding links were correct as of November 13, 2014. If you find a link is broken, provide feedback and a VMware employee will update the link.

For translated versions of this article, see:


corrupt-download downloaded-fusion-application

Request a Product Feature

To request a new product feature or to provide feedback on a VMware product, please visit the Request a Product Feature page.


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