how to install postgresql for mac os x

I use homebrew,write this order to terminal.app to install postgresql.

`brew install postgresql` <pre>==> Installing postgresql dependency: ossp-uuid ==> Downloading ftp://ftp.ossp.org/pkg/lib/uuid/uuid-1.6.2.tar.gz curl: (7) couldn't connect to host Trying a mirror... ==> Downloading http://www.mirrorservice.org/sites/ftp.ossp.org/pkg/lib/uuid/uuid-1.6.2.tar.gz ######################################################################## 100.0% ==> ./configure --disable-debug --without-perl --without-php --without-pgsql --prefix=/usr/local/Cell ==> make ==> make install /usr/local/Cellar/ossp-uuid/1.6.2: 12 files, 332K, built in 62 seconds ==> Installing postgresql ==> Downloading http://ftp9.us.postgresql.org/pub/mirrors/postgresql/source/v9.1.1/postgresql-9.1.1.t ######################################################################## 100.0% ==> ./configure --disable-debug --prefix=/usr/local/Cellar/postgresql/9.1.1 --enable-thread-safety -- ==> make install-world ==> Caveats # Build Notes If builds of PostgreSQL 9 are failing and you have version 8.x installed, you may need to remove the previous version first. See: https://github.com/mxcl/homebrew/issues/issue/2510 To build plpython against a specific Python, set PYTHON prior to brewing: PYTHON=/usr/local/bin/python brew install postgresql See: http://www.postgresql.org/docs/9.1/static/install-procedure.html # Create/Upgrade a Database If this is your first install, create a database with: initdb /usr/local/var/postgres To migrate existing data from a previous major version (pre-9.1) of PostgreSQL, see: http://www.postgresql.org/docs/9.1/static/upgrading.html # Start/Stop PostgreSQL If this is your first install, automatically load on login with: mkdir -p ~/Library/LaunchAgents cp /usr/local/Cellar/postgresql/9.1.1/org.postgresql.postgres.plist ~/Library/LaunchAgents/ launchctl load -w ~/Library/LaunchAgents/org.postgresql.postgres.plist If this is an upgrade and you already have the org.postgresql.postgres.plist loaded: launchctl unload -w ~/Library/LaunchAgents/org.postgresql.postgres.plist cp /usr/local/Cellar/postgresql/9.1.1/org.postgresql.postgres.plist ~/Library/LaunchAgents/ launchctl load -w ~/Library/LaunchAgents/org.postgresql.postgres.plist Or start manually with: pg_ctl -D /usr/local/var/postgres -l /usr/local/var/postgres/server.log start And stop with: pg_ctl -D /usr/local/var/postgres stop -s -m fast # Other Some machines may require provisioning of shared memory: http://www.postgresql.org/docs/current/static/kernel-resources.html#SYSVIPC If you want to install the postgres gem, including ARCHFLAGS is recommended: env ARCHFLAGS="-arch x86_64" gem install pg To install gems without sudo, see the Homebrew wiki. ==> Summary /usr/local/Cellar/postgresql/9.1.1: 2739 files, 37M, built in 7.1 minutes </pre> 

This is my first install. So, I write below. '$ initdb/usr/local/var/postgres'

but it's error. why??

-bash: initdb/usr/local/var/postgres: No such file or directory

next, I write below. It's also error.

`$ pg_ctl -D /usr/local/var/postgres -l /usr/local/var/postgres/server.log start` <pre>sh: /usr/local/var/postgres/server.log: No such file or directory</pre> 

I check it does finish to download.

`$ brew list` <pre> brew-gem node postgresql readline libyaml ossp-uuid rails ruby </pre> 

I could see there is postgresql.

So, I don't know how I install postgresql. I'm a very begginer.