gem install pg doesn't work on OSX Lion

Question

There are variations of this question bouncing around SO, but none of them seem to have an answer that solves my problem.

I am running OSX Lion (10.7.3). The latest

Answer 1

$ gem install pg

If that failed:

$ sudo gem install pg

Then, if that failed:

$ sudo find / -name “pg_config”

After you find pg_config's location, run this to finally install it:

$ sudo gem install pg --with-pg-config=/usr/local/Cellar/postgresql/9.5.1/bin/pg_config

Of course, you'll want to change the path to wherever you found pg_config.

Then, check your installed gems with gem list, and it should show something like this:

More information can be found in my guide.