Install The CSS3 Font Converter (http://www.useragentman.com/blog/the-css3-font-converter/) on OS X Yosemite for on demand @font-face conversion on the command line. Also see http://cfxdesign.com/css3-font-converter-is-a-command-line-font-face-converter

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1. $ brew install fontforge ttf2eot ttfautohint

2. $ brew tap bramstein/webfonttools && brew install sfnt2woff

3. Download/clone https://github.com/google/woff2 into any handy dir
   cd into dir and:
     $ git submodule init
     $ git submodule update
     $ make clean all
   then:
     $ ln -s /path/to/woff2_compress /usr/local/bin/woff2_compress
     $ ln -s /path/to/woff2_decompress /usr/local/bin/woff2_decompress
     
4. Download/clone https://github.com/zoltan-dulac/css3FontConverter into /usr/local/bin/css3FontConverter

5. Add these two lines to ~/.profile
   # Convert TTF/OTF font to @font-face font stack
   alias fontstack='/usr/local/bin/css3FontConverter/convertFonts.sh'

6. Restart your Terminal

7. In Terminal, cd into the dir containing your font and run:
   $ fontstack font-to-convert.ttf