Mcrypt is required on OS X Mavericks 10.9.4

I'm stuck on the /admin/install page, getting an error "Can't run Craft :(" saying that Mcrypt is required.

I've tried installing with Homebrew, but kept getting an error. So, I installed mcrypt manually using these instructions on Stack Overflow (https://stackoverflow.com/questions/14595841/installing-mcrypt-extension-for-php-on-osx-mountain-lion). PHP and Mcrypt are installed:

$ which php
/usr/local/bin/php

$ which mcrypt
/usr/local/bin/mcrypt

And in my php.ini file I've added:

extension=mcrypt.so

(I've also tried including the path extension=/usr/local/bin/mcrypt.so)

In the ;extension area (around line 880).

Even after restarting Apache, I still get the same error that "Mcrypt isn't installed" from Craft.