Estoy tratando de instalar una gema ruby, pero el proceso de instalación se detiene porque:

ld: file not found: /usr/local/lib/libfreetype.6.dylib for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

¿Cómo puedo instalar esta biblioteca? Revisé el/usr/local/lib/ y ahí falta la biblioteca.

EDITAR:

corríbusque libfreetype.6.dylib y consiguió:

/Applications/MAMP/Library/lib/libfreetype.6.dylib
/Applications/VLC.app/Contents/MacOS/lib/libfreetype.6.dylib
/Applications/XAMPP/xamppfiles/lib/libfreetype.6.dylib
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk/usr/X11/lib/libfreetype.6.dylib
/Applications/calibre.app/Contents/Frameworks/libfreetype.6.dylib
/Users/xxxxx/magick-installer/freetype-2.4.3/objs/.libs/libfreetype.6.dylib
/Users/xxxxx/magick-installer/freetype-2.4.3/objs/.libs/libfreetype.6.dylib.dSYM
/Users/xxxxx/magick-installer/freetype-2.4.3/objs/.libs/libfreetype.6.dylib.dSYM/Contents
/Users/xxxxx/magick-installer/freetype-2.4.3/objs/.libs/libfreetype.6.dylib.dSYM/Contents/Info.plist
/Users/xxxxx/magick-installer/freetype-2.4.3/objs/.libs/libfreetype.6.dylib.dSYM/Contents/Resources
/Users/xxxxx/magick-installer/freetype-2.4.3/objs/.libs/libfreetype.6.dylib.dSYM/Contents/Resources/DWARF
/Users/xxxxx/magick-installer/freetype-2.4.3/objs/.libs/libfreetype.6.dylib.dSYM/Contents/Resources/DWARF/libfreetype.6.dylib
/Users/xxxxx/rubydev/sharelock-staging/magick-installer/freetype-2.4.3/objs/.libs/libfreetype.6.dylib
/Users/xxxxx/rubydev/sharelock-staging/magick-installer/freetype-2.4.3/objs/.libs/libfreetype.6.dylib.dSYM
/Users/xxxxx/rubydev/sharelock-staging/magick-installer/freetype-2.4.3/objs/.libs/libfreetype.6.dylib.dSYM/Contents
/Users/xxxxx/rubydev/sharelock-staging/magick-installer/freetype-2.4.3/objs/.libs/libfreetype.6.dylib.dSYM/Contents/Info.plist
/Users/xxxxx/rubydev/sharelock-staging/magick-installer/freetype-2.4.3/objs/.libs/libfreetype.6.dylib.dSYM/Contents/Resources
/Users/xxxxx/rubydev/sharelock-staging/magick-installer/freetype-2.4.3/objs/.libs/libfreetype.6.dylib.dSYM/Contents/Resources/DWARF
/Users/v/rubydev/sharelock-staging/magick-installer/freetype-2.4.3/objs/.libs/libfreetype.6.dylib.dSYM/Contents/Resources/DWARF/libfreetype.6.dylib
/opt/X11/lib/libfreetype.6.dylib
/usr/local/Cellar/freetype/2.4.10/lib/libfreetype.6.dylib

Pero ¿por qué el sistema no encuentra la biblioteca?