unable to install pg gem

Question

I tried using gem install pg but it doesn\'t seem to work.

gem install pg gives this error

Temporarily enhancing PATH to in         


        

Answer 1

Use with ARCH flag.

sudo env ARCHFLAGS="-arch x86_64" gem install pg

This resolved the same issue you are having.

Answer 2

I've been experiencing this annoying problem with PG for years. I created this gist to help.

The following command always work for me.

# Substitute Postgres.app/Contents/Versions/9.5 with appropriate version number
sudo ARCHFLAGS="-arch x86_64" gem install pg -- --with-pg-config=/Applications/Postgres.app/Contents/Versions/9.5/bin/pg_config

gist: https://gist.github.com/sharnie/5588340cf023fb177c8d