- There was a conflict in two different installations (one being installed via the application, the other being installed via homebrew)
- Something else was running on port 5432
- Could not install
pg gem
- Uninstalled
postgresqlusinghomebrew. You can usebrew listto see all of the versions that you may have installed. (Note if you do have more than one version installed you will have to specify which version to brew uninstall)