Each PDF file encapsulates a complete description of a fixed-layout flat document, including the text, fonts, graphics, and other information needed to display it. The Portable Document Format (PDF) is a file format used to present documents independent of application software, hardware, and operating systems. Unfortunately, MAC images can only contain graphics in black-and-white.
The files can still be opened and viewed by a few programs nowadays, despite being published in 1984. MAC files are raster images created by MacPaint, one of the first painting programs that have been developed for Macintosh computers. Application/pdf, application/x-pdf, application/x-bzpdf, application/x-gzpdf