These packages install 4-way universal binaries which will run natively on both PowerPC and Intel platforms, in either 32 or 64 bit mode.
Requirements:
PowerPC: Mac OS X 10.4 or later
Intel: Mac OS X 10.5 or later



Individual Installers:


Files will be installed into /usr/local. libpng will also be installed as an OS X framework in /Library/Frameworks. (Use “Customize” button in the installer to disable.)
The libpng installation includes both the latest 1.4 branch as well as the 1.2 branch for backward compatibility. When developing, use libpng/png.h and -lpng for the latest version, or libpng12/png.h and -lpng12 for the 1.2 branch.
libpng source provided by http://www.libpng.org
libjpeg source provided by http://www.ijg.org
Why are these being provided here? Tekkotsu relies on libjpeg and libpng for image compression and decompression. Mac OS X does not ship with these libraries pre-installed (or at least not in one of the locations search by Linux-style software), and so we provide installers as a convenience for our OS X users, and by extension, everyone else.