OS X 10.9
Run:
easy_install PIL
An exception is thrown:
fatal error: 'freetype/fterrors.h' file not found
#include <freetype/fterrors.h>
^
1 error generated.
error: Setup script exited with error: command 'clang' failed with exit status 1
fixed:
ln -s /usr/local/include/freetype2 /usr/local/include/freetype