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
The current behavior of the different installers is documented at https://wiki.postgresql.org/wiki/Installers/Mac_OS_X#Known_Installers. Homebrew does not, as someone commented above, put the data under /Library.
/Library