psql: could not connect to server: No such file or directoryIs the server running locally and accepting

                        

• 用brew卸载postgresql： brew uninstall postgresql
• brew doctor （修正这里的一切）
• brew prune

• 删除所有Postgres文件夹：

  • rm -r /usr/local/var/postgres
  • rm -r /Users/<username>/Library/Application\ Support/Postgres

• 用brew重新安装postgresql： brew install postgresql

• 启动服务器： brew services start postgresql

重新运行 psql postgres  没有错误