This article is referenced from stackoverflow:
If installed PostgreSQL with
homebrew , enter
brew uninstall postgresql
If you used the EnterpriseDB installer , follow the following step.
Run the uninstaller on terminal window
If installed with Postgres Installer, do:
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