Represents the "Mac" entry of the embedded file parameter
It is an optional entry defined as part of the PDF 1.0
specification. It was deprecated in PDF 2.0.
It contains a MacOSFileInformationElement.
For definitive details see:.
The ISO PDF Specification, ISO 32000-1:2008 PDF 1.7; Table: 46,
The ISO PDF
Specification, ISO 32000-2:2017 PDF 2.0; Table: 45, page 137.