I have a macbook running snow leopard. I recently installed postgresql 9.0 on it. I also installed pg with the following command:
sudo env ARCHFLAGS='-arch x86_64' gem install pg
The result was fine:
Building native extensions. This could take a while... Successfully installed pg-0.9.0 1 gem installed Installing ri documentation for pg-0.9.0... Installing RDoc documentation for pg-0.9.0...
I launched rails and when I tried to access http://localhost:3000/ I got the following error:
LoadError (no such file to load -- pg):