Convert TTC font to TTF.
ttc2ttf.py is a simple Python script, that takes single TTC file as an input and produces bunch of TTF files as an output, one TTF file for each font stored in TTC file.
brew install fontforge
pip install fonttoolspython ttc2ttf.py <ttc_file> [--monospaced] [--output-folder <output_folder>]
Use --monospaced option for fixed sized fonts.
If --output-folder is ommited, TTF files will be saved into current location.
python ttc2ttf.py bin/Courier.ttc --monospaced --output-folder bin/Courier
cp bin/Courier/*.ttf ~/Library/Fonts