Sometimes you just have to convert an iconset file to an icns file. And who knew, Apple was kind enough to give us a command to do just that in OS X! To use the iconutil command, run it with the -c option which indicates that the file will be converted. The -o indicates the file to convert a file to. Let’s use the myfile.iconset as the source file and then mynewfile.icns as the target file. The command would be as follows:
iconutil -c myfile.iconset -o mynewfile.icns
