If you are using a Mac and run intro trouble when trying to upload fonts to the font face generator it is because you are using an old-style Mac PostScript font.
But don’t panic we have a solution that we came across on the Cufon documentation on how to convert old-style Mac PostScript fonts into the correct format.
If your font file does not have an extension, it is most likely a PostScript font, and as such probably quite old, too. The problem is that all files on Mac OS have both a Data Fork, which contains the actual data of the file, and a Resource Fork, which can contain pretty much anything. Those old-style Mac fonts used to store everything to the Resource Fork.
The easiest way to do this is to open the terminal application on your Mac (it’s in the Utilities folder of your Applications folder).
Now, move or copy the font file to your home folder. For the purposes of this example, we’ll assume that the full name of the file is “MyFontReg”. Now, write the following to Terminal (remember to replace MyFontReg with the actual name of the file) and press enter:
cat "YourFontName/..namedfork/rsrc" > " YourFontName.dfont"
You should now see your font like this (MyFontReg.dfont) in the home directory of your MAC. You can now use this .dfont file on the Font Squirrel Font Face Generator.
NOTE this will only work using a MAC. Windows users you’re on your own.