Based on Homebrew/homebrew-versions these formulae provide older versions of certain packages.

Just brew tap ilikepi/old and then brew install <formula>.

If the formula conflicts with one from Homebrew/homebrew-core or another tap, you can brew install ilikepi/old/<formula>.

You can also install via URL:

brew install https://raw.github.com/ilikepi/homebrew-old/master/<formula>.rb

• The postgresql@8.4 formula does not have the latest patch release of 8.4
• The postgis@1.4 formula is a work-in-progress and as of yet untested

brew help, man brew, or the Homebrew documentation.