Warning message when trying to use the Tex extension: The fantastic lxml wrapper for libxml2 is required by inkex.py and therefore this extension. Please download and install the latest version from http://cheeseshop.python.org/pypi/lxml/, or install it through your package manager by a command like: sudo apt-get install python-lxml Download and install libxml2 and xslt for mac from here . Follow install instructions. STATIC_DEPS=true easy_install lxml sudo easy_install lxml Leads to next error message Contents/Resources/extensions/textext.py:55: DeprecationWarning: the md5 module is deprecated; use hashlib instead import os, sys, tempfile, traceback, glob, re, md5, copy Traceback (most recent call last): File "Contents/Resources/extensions/textext.py", line 933, in <module> e.affect() File "/Applications/Writing/Inkscape.app/Contents/Resources/extensions/inkex.py", line 207, in affect self.effect() ...