Version 6.8.1 of the tools is now available. Please update to the latest version if you are having issues. To leave a comment, see the previous post: DRM Removal Tools for eBooks.
DeDRM_tools_6.8.1.zip can be downloaded from
This release is for calibre 4.x and earlier.
This releases fixes a problem with retrieving the Kindle for Mac key under Mac OS X Big Sur. The Obok plugin hasn’t been changed.
If you are already using 6.8.0 you only need this update if you use Kindle for Mac under Mac OS X Big Sur.