Unlike previous version of OS X, Leopard doesn’t come with PHP’s PEAR repository installed by default. Luckily, installing is quick and painless.
From a command line:
curl http://pear.php.net/go-pear > go-pear.php
sudo php -q go-pear.php
(Just press enter to select all the default choices.)
Next we need to modify our php.ini file to include the new PEAR files:
sudo cp /etc/php.ini.default /etc/php.ini
Edit /etc/php.ini and change
;include_path = “.:/php/includes”
to read
include_path = “.:/usr/share/pear”
Restart Apache and you’re done!
[Adapted from http://clickontyler.com/blog/2008/01/how-to-install-pear-in-mac-os-x-leopard/]