NAMEppmtopict - convert a portable pixmap into a Macintosh PICT file
DESCRIPTIONReads a portable pixmap as input. Produces a Macintosh PICT file as output.
The generated file is only the data fork of a picture. You will need a program such as mcvert to generate a Macbinary or a BinHex file that contains the necessary information to identify the file as a PICT file to MacOS.
Even though PICT supports 2 and 4 bits per pixel, ppmtopict always generates an 8 bits per pixel file.