Convert DFONT to CFF

The DFONT file extension stands for "Data Fork Font", a format used in Mac OS X (now macOS). Introduced to replace the older resource fork-based TrueType fonts, DFONT consolidates all font data into the data fork, enhancing compatibility with the OS X file system. Historically, DFONT was employed for system fonts like Courier and Helvetica, but it has been largely superseded by TrueType (TTF) and OpenType (OTF) formats. DFONT files are specific to macOS and cannot be used on Windows or Linux systems.

CFF, or Compact Font Format, is a file extension used in computer technology for efficient storage of font data. CFF was developed as part of Adobe's PostScript technology to streamline font file sizes while maintaining high-quality vector graphics. Its primary use is in embedded systems, print, and digital media, providing a compact and versatile format for typefaces. The history of CFF dates back to the early 1990s when it was introduced to address the need for more efficient font management in professional publishing and graphic design environments.