Thread: Dealing with Kindle for PC/Mac 1.19 and KFX in calibre
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Old 01-05-2018, 02:30 PM   #340
gbm
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Quote:
Originally Posted by jhowell View Post
Starting with version 1.19 for most books Kindle for PC and Kindle for Mac use the new KFX format, which is incompatible with calibre.

These books will appear in a subdirectory of the "My Kindle Content" folder, will import into calibre as "AZW" format, and will fail to convert with the error: "KFXError: This is an Amazon KFX book. It cannot be processed."

The following descriptions apply both to Kindle for PC and Kindle for Mac unless one mentioned explicitly.




Method 2 - Disable KFX support in Kindle for PC/Mac

As an alternative, a method is available to prevent versions 1.19, 1.20 and 1.21 from making use of KFX format.
  • Exit the Kindle program.
  • Open a command window (PC) or terminal window (Mac).
  • Cut and paste the appropriate command for your operating system to disable the renderer-test program.
    PC:
    Code:
    ren %localappdata%\Amazon\Kindle\application\renderer-test.exe renderer-test.xxx
    Mac:
    Code:
    chmod -x /Applications/Kindle.app/Contents/MacOS/renderer-test
    This prevents the renderer-test program from executing, blocking the use of KFX.

    PC Note: The renderer-test program may be in a different location in some Kindle for PC installations. If the rename command fails look in other folders, such as C:\Program Files\Amazon\Kindle.

    Mac Note: If the chmod command fails with a permission error try again using sudo.
  • After restarting the Kindle program any books previously downloaded in KFX format will no longer open. You will need to remove them from your device and re-download them. All future downloads will use the older Kindle formats instead of KFX although they will continue to be placed in one individual subdirectory per book.

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This works with K4PC 1.21 with Linux Wine Stable(wine-2.0.4) Method 2 - Disable KFX support in Kindle for PC/Mac. Use your file manger to navigate to your kindle program folder and rename renderer-test.exe, example renderer-test.xxx.


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