Error con MySql al realizar la instalación del paquete

Encontré mi solución y aquí está:

Paso 1:Limpie su rvm y Xcode previamente instalados

    => rm -rf ~/.rvm    
    => sudo rm -rf /Developer

Paso 2:Instale Xcode desde App Store o el instalador podría guardarse en su Launchpad.

Paso 3:Instalar HomeBrew:

    => mkdir -p /usr/local/Cellar
    => /usr/bin/ruby -e "$(curl -fsSL https://raw.github.com/gist/323731)"

Paso 4:Instalar RVM

    => bash < <(curl -s https://rvm.beginrescueend.com/install/rvm)
    => echo '[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" #  Load RVM function' >> ~/.bash_profile

Paso 5:Instale Ruby 1.9.2

    => rvm install 1.9.2
    => rvm use ruby-1.9.2 --default
    => gem install rails thin bundler
    => rvm install 1.9.2-head
    => brew install git ack wget curl redis memcached libmemcached colordiff imagemagick

Paso 6:Instale MySql

    => brew install mysql
    => mysql_install_db --verbose --user=`whoami` --basedir="$(brew --prefix mysql)" --datadir=/usr/local/var/mysql --tmpdir=/tmp
    => mkdir -p ~/Library/LaunchAgents
    => cp /usr/local/Cellar/mysql/5.5.15/com.mysql.mysqld.plist ~/Library/LaunchAgents/
    => launchctl load -w ~/Library/LaunchAgents/com.mysql.mysqld.plist
    => mysql -u root
    => UPDATE mysql.user SET Password=PASSWORD('password') WHERE User='root';
    => FLUSH PRIVILEGES;