Meteor - Path to the MongoDB executable in OSX

/Users/USER_NAME_HERE/.meteor/packages/meteor-tool/.1.1.10.1b51q9m++os.osx.x86_64+web.browser+web.cordova/mt-os.osx.x86_64/dev_bundle/mongodb/bin/mongo

PS. This will of course depend on your version of Meteor (1.2.1 in this case) and OSX (10.11 in this case).