Start PostgreSQL:

sudo -u postgres /Library/PostgreSQL/9.6/bin/pg_ctl -D /Library/PostgreSQL/9.6/data start

Stop PostgreSQL:

sudo -u postgres /Library/PostgreSQL/9.6/bin/pg_ctl -D /Library/PostgreSQL/9.6/data stop

Stop PostgreSQL from auto-starting on reboot:

sudo launchctl unload -w /Library/LaunchDaemons/com.edb.launchd.postgresql-9.6.plist 

Make PostgreSQL auto-start on reboot:

sudo launchctl load -w /Library/LaunchDaemons/com.edb.launchd.postgresql-9.6.plist 

Mac启动时，不自动启动postgresql，也可以作为停止postgresql的命令：

 sudo launchctl unload -w /Library/LaunchDaemons/com.edb.launchd.postgresql-9.6.plist

自动启动postgresql，也可以作为启动postgresql的命令：

 sudo launchctl unload -w /Library/LaunchDaemons/com.edb.launchd.postgresql-9.6.plist

Start/Stop PostgreSQL on Mac