Brief and download link of Fontlab a good font editor program for the Macintosh system.

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FontLab font editor for Macintosh

Glyph Editor - Native Adobe Type 1 and Native TrueType font editors. Does everything you need to produce new fonts, add characters to fonts, or change characters. Perfect accuracy and reproducibility.
Multiple Masters - Make your own multiple master fonts with up to 4 axes
TrueType & Type 1 Hinting - Add hints manually or automatically for beautiful screen and low-res fonts.
VectorPaint Tools - Perform paint operations in a vector environment

Web site: http://www.fontlab.com/html/fontlab.html