Port でインストール
sudo port install postgresql84 postgresql84-server
インストールログで以下のように表示されるので、指示通りコマンドを発行
###########################################################
# A startup item has been generated that will aid in
# starting postgresql84-server with launchd. It is disabled
# by default. Execute the following command to start it,
# and to cause it to launch at startup:
#
# sudo port load postgresql84-server
###########################################################
- > Installing postgresql84-server @8.4.8_0
To create a database instance, after install do
sudo mkdir -p /opt/local/var/db/postgresql84/defaultdb
sudo chown postgres:postgres /opt/local/var/db/postgresql84/defaultdb
sudo su postgres -c '/opt/local/lib/postgresql84/bin/initdb -D /opt/local/var/db/postgresql84/defaultdb'To tweak your DBMS, consider increasing kern.sysv.shmmax by adding an increased kern.sysv.shmmax .. to /etc/sysctl.conf