Forbidden message when accessing phpMyAdmin in localhost on OSX 10.10 (Yosemite)

Problem

When accessing http://localhost/phpmyadmin:

Forbidden
You don't have permission to access /phpmyadmin/ on this server.

Solution

Change your Apache's Access Control configuration:

Order allow,deny
Allow from all

to:

Require all granted

Reference
http://httpd.apache.org/docs/2.4/upgrading.html#access