Cannot install Lxml on Mac OS X 10.9
I solved this issue on Yosemite by both installing and linking libxml2 and libxslt through brew:
brew install libxml2brew install libxsltbrew link libxml2 --forcebrew link libxslt --forceIf you have solved the problem using this method but it pops up again at a later time, you might need to run this before the four lines above:
brew unlink libxml2brew unlink libxsltIf you are having permission errors with Homebrew, especially on El Capitan, this is a helpful document. In essence, regardless of OS X version, try running:
sudo chown -R $(whoami):admin /usr/local