How completely uninstall PostgreSQL 9.X on Mac OSX
This article is referenced fromstackoverflow:
If installed Postgresql withhomebrew,enterbrew uninstall postgresql
If you used theEnterpriseDB installer,follow the following step.
Run the uninstaller on terminal window
sudo /Library/Postgresql/9.X/uninstall-postgresql.app/Contents/MacOS/installbuilder.sh
If installed with Postgres Installer,do:
open /Library/Postgresql/9.X/uninstall-postgresql.app
Remove the Postgresql and data folders. The Wizard will notify you that these were not removed.
sudo rm -rf /Library/Postgresql
Remove the ini file:
sudo rm /etc/postgres-reg.ini
Remove the Postgresql user using System Preferences -> Users & Groups.
Unlock the settings panel by clicking on the padlock and entering your password.
Select the Postgresql user and click on the minus button.
Restore your shared memory settings:
sudo rm /etc/sysctl.conf
