Installing older version of postgres using homebrew

Question

I am trying to use an older version of postgres and I cannot get it to work. When I run brew search postgres I see:

$ brew search postgresql
==> Searching local taps...
postgresql ✔         [email protected] ✔      [email protected]          [email protected]

but then when I run brew switch postgres 9.4 I see:

$ brew switch postgresql 9.4
Error: postgresql does not have a version "9.4" in the Cellar.
Versions available: 9.6.2, 9.6.4

What am I missing? I need to run version 9.4

You need to brew install [email protected] first.

teppic
– teppic

2017-11-02 00:26:49 +00:00
Commented Nov 2, 2017 at 0:26 — teppic
– teppic, Commented Nov 2, 2017 at 0:26

bfontaine · Accepted Answer · 2017-11-03 11:01:27Z

1

brew switch works only on installed versions of a specific formula. You have postgresql versions 9.6.2 and 9.6.4 on your machine, so you can only switch to one of those.

However Homebrew provides fixed-version formulae using the <name>@<version> thing. In order to get Postgres 9.4, you can run the following command:

brew install [email protected]

answered Nov 3, 2017 at 11:01

bfontaine

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