This command in the make.osx file: python2.7 -c 'import urllib; urllib.urlretrieve(" http://sourceforge.net/projects/libpng/files/libpng-stable/1.2.39/libpng-1.2.39.tar.gz/download", "libpng-1.2.39.tar.gz")' returns a bunch of html. I'm not sure what the new URL is, but it should be a simple fix. ................................................................................... Uri Laserson Graduate Student, Biomedical Engineering Harvard-MIT Division of Health Sciences and Technology M +1 917 742 8019 las...@mi...