I had this error for a very long time when trying to use extensions in Inkscape 0.46 for Mac OS X:
“The fantastic lxml wrapper for libxml2 is required by inkex.py and therefore this extension”
After many hours of trying to find a solution I got it to work. This is what I did:
sudo easy_install lxml cd /Applications/Inkscape.app/Contents/Resources/lib mv libxml2.2.dylib libxml2.2.dylib.old ln -s /usr/lib/libxml2.dylib
After that, all extensions (those found under the effects menu) started to work.
Update:
The problem seems to be fixed on the latest development version.
Update 2:
Fixed typo. Thanks to Bill Gathen for your comment.
Update 3:
Finally a version of Inkscape that works as expected out of the box. Tested on Mountain Lion. Link posted at the Inkscape development email list. Bonus: partial retina display support and no X11 required!
Update 4:
An up-to-date solution by Callum Vincent:
Thanks Callum Vincent! I haven’t used Inkscape in OS X for a while (I use Linux mostly now). I’ve updated the post with a link to your comment.