If you’ve tried the usual of:

$ brew services stop postgresql $ rm /usr/local/var/postgres/postmaster.pid $ brew services start postgresql # Or: brew services restart postgresql 

…and banged your head a lot, you may find it’s your Mac! Go to:

System Settings > General > Login Items and Extensions > Allow in the Background

To check if you have postgres listed and that it is on!

And if your system is a bit messed up (like mine, thank you Apple!) you may even have TWO!!! BOTH of these must be ON!!

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Hope this helps someone!