How to install PHPUnit to Mac OSX

- Install PEAR

curl -O http://pear.php.net/go-pear.phar
php -d detect_unicode=0 go-pear.phar

- Install PHPUnit

sudo pear channel-discover pear.phpunit.de
sudo pear channel-discover pear.symfony-project.com
sudo pear channel-discover components.ez.no
sudo pear install --force --alldeps phpunit/PHPUnit

- Set phpunit bin path to System Environment Variables

Credit
Getting and installing the PEAR package manager
PHPUnit Installed on Mac OSX