I\'m sure this has been answered but I cannot seem to find an answer.
I installed postgresql using Homebrew (brew install postgresql) which installed to /usr/local/Cella
In my case (not homebrew) the data location is found in this file /Library/LaunchDaemons/com.edb.launchd.postgresql-9.3.plist
/Library/LaunchDaemons/com.edb.launchd.postgresql-9.3.plist
/Users/me/bin/postgres/bin/postmaster -D/Users/me/data/postgres