MongoDB installation on Mac OS via brew

After installing MongoDB with Homebrew:

• The databases are stored in the /usr/local/var/mongodb/ directory
• The mongod.conf file is here: /usr/local/etc/mongod.conf
• The mongo logs can be found at /usr/local/var/log/mongodb/
• The mongo binaries are here: /usr/local/Cellar/mongodb/[version]/bin

Source: http://stackoverflow.com/questions/13827915/location-of-the-mongodb-database-on-mac