Ok, I have a fix for opening

Ok, I have a fix for opening Versions.app diffs with Changes.app thanks to Dirk at Versions support.

This fix redirects the opendiff command to Changes.app's chdiff command line tool. Hopefully in the near future, you will be able to change diff tools via the Versions.app Preferences menu.

Follow the steps below at your own risk. I recommend only doing this is you are familiar with command line operations.

      Open terminal
      Enter the following commands... # sign is the prompt (don't type it!)
      # sudo -s
      # cd /usr/bin
      # cp opendiff opendiff.original
      # rm opendiff
      # ln -s /Applications/Changes.app/Contents/Resources/chdiff opendiff

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