Here's a gist I wrote to help with installing postgres on OS X.
1) you must first uninstall the 'pg' gem if you have it installed already.
gem uninstall pg or
bundle exec gem uninstall pg in the context of a project (rails, sinatra, anything with a Gemfile).
2) Install postgres with homebrew.
brew install postgres
/usr/local/bin to the head of your
$PATH to ensure the homebrew version of postgres is used.
Add this to your
.zshrc depending on your preferred shell.
4) Create a database for your system to use. Your current user will be the owner.
If one already exists, remove it with
rm -rf /usr/local/var/postgres and try the command above again.
5) Create a LaunchAgent to start postgres on boot.
Your postgres version below may be different. Adjust the path for your system.
cp /usr/local/Cellar/postgresql/9.2.2/homebrew.mxcl.postgresql.plist ~/Library/LaunchAgents
If you notice another postgres LaunchAgent in
~/Library/LaunchAgents/ you should remove it.
6) Load the LaunchAgent via
launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist
7) Finally, reinstall the 'pg' gem.
gem install pg or
I hope this helps!
Please comment or submit changes.