Problems with MySQL Installation

Do you have mysql installed? What happens when you type: mysql --
version

i.e.: mysql --version
mysql Ver 14.14 Distrib 5.1.31, for apple-darwin9.5.0 (powerpc) using
readline 5.1

How about when you type: which mysql_config

i.e.: which mysql_config
/usr/local/mysql/bin/mysql_config

Assuming you have mysql installed, you can install the mysql gem by
typing:

gem install mysql --with-mysql-config=/usr/local/mysql/bin/
mysql_config

NOTE: substitute your path to mysql_config for mine here.

If you don't have mysql installed, go to http://www.mysql.com/ and
follow the download instructions for your system.