FontDoctor for Macintosh
FontDoctor is the leading industry standard software for font problem diagnosis, repair, and organization. FontDoctor is a professional software tool that will locate and eliminate hard-to-find font problems that wreak havoc on the Macintosh system performance and applications. FontDoctor will scan font folders (on local hard drives or over a network) to locate and repair common font illnesses, including missing Postscript fonts, missing bitmaps, corrupt/damaged fonts, font ID conflicts, extra fonts sizes, mixed fonts types, and lots more.

FontDoctor offers powerful font organization and archiving features that allow FontDoctor to sort and clean-up existing font folders into a neatly organized font library. Now your fonts can be easily organized by font name, family name, alphabetically, or by a whole host of other flexible font organization options.
System Requirements:
Mac OS 9.0 or higher, 5 megabytes of Free RAM
System Support:
PostScript Fonts (Type 1 & 3), TrueType Fonts (Mac & Windows)
Multiple Master Fonts, OpenType Fonts, DataFork (.dfont) Fonts (in OS X)