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Building mpl on OSX is sometimes a nightmare because of all the

different types of zlib, png and freetype that may be on your system.

For developers who want to build matplotlib from source, the recommended and

supported way to build is to use a third-party package manager to install the

required dependencies, and then install matplotlib from source using the

setup.py script. Two widely used package managers are homebrew, and

MacPorts. The following example illustrates how to install libpng and freetype

using brew:

Example usage::

brew install libpng freetype pkg-config

If you are using MacPorts, execute the following instead:

Example usage::

port install libpng freetype pkgconfig

To install matplotlib from source, execute:

Example usage::

python setup.py install

Note that your environment is somewhat important. Some conda users have

found that, to run the tests, their PYTHONPATH must include

/path/to/anaconda/.../site-packages and their DYLD_FALLBACK_LIBRARY_PATH

must include /path/to/anaconda/lib.