rails - postgres error: Reason: Incompatible library version: libpq.5.dylib requires version 1.0.0 or later,

Question

I am stuck with the setup of Ruby (1.9.3), Rails and Postgres (9.0.8) on my Mac (10.6.8). Everytime when I run rails console I get the following error:

Answer 1

Install new PostgreSQL version (i've used homebrew)

brew install postgres

Then reinstall the gem pg:

gem uninstall pg
gem install pg

Hope it helps.