How To Install Pyscopg2 Python Postgres Driver on Mac OSX with Homebrew, Postgres.app and VirtualEnv

You might have to append the path of the Postgres.app bin directory to your path in order to install the Python driver for Posgres.

export PATH=$PATH:/Applications/Postgres.app/Contents/MacOS/bin

To find the location of the application try this

ls -lha `which psql`