picttoppm

Convert a Macintosh PICT file to a PPM image. More information: https://netpbm.sourceforge.net/doc/picttoppm.html.

picttoppm path/to/file.pict > path/to/file.ppm

picttoppm -fullres path/to/file.pict > path/to/file.ppm

picttoppm -noheader -quickdraw path/to/file.pict > path/to/file.ppm