libicns is a library for manipulation of the Mac OS icns resource format and includes the icns2png converter
libicns is a library for manipulation of the Mac OS icns resource format, also known as the IconFamily resource type. It can read and write files from the Mac OS X icns format, as well as read from Mac OS resource files and macbinary encoded Mac OS resource forks. As of release 0.5.9, it can fully read and write any 128x128 and all smaller 32-bit icons, and read support for 8-bit, 4-bit, and 1-bit icons. If linked against (a patched version of) Jasper, it also has full support for 256x256 and 512x512 32-bit icons with masks as alpha channels. libicns includes icns2png, a tool for extracting the images contained within icns files, and saving them as png images. It also includes png2icns, a tool for creating icns files from a set of png images. Furthermore, release 0.8.1 implements 1024x1024 support.
libicns is a library for manipulation of the Mac OS icns resource format, also known as the IconFamily resource type. It can read and write files from the Mac OS X icns format, as well as read from Mac OS resource files and macbinary encoded Mac OS resource forks. As of release 0.5.9, it can fully read and write any 128x128 and all smaller 32-bit icons, and read support for 8-bit, 4-bit, and 1-bit icons. If linked against (a patched version of) Jasper, it also has full support for 256x256 and 512x512 32-bit icons with masks as alpha channels. libicns includes icns2png, a tool for extracting the images contained within icns files, and saving them as png images. It also includes png2icns, a tool for creating icns files from a set of png images. Furthermore, release 0.8.1 implements 1024x1024 support.
To install libicns, run the following command in macOS terminal (Applications->Utilities->Terminal)
sudo port install libicns
To see what files were installed by libicns, run:
port contents libicns
To later upgrade libicns, run:
sudo port selfupdate && sudo port upgrade libicns
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