ref – http://www.mkyong.com/mongodb/how-to-install-mongodb-on-mac-os-x/

Moving files

First download the mongo database file from its website. Be default, your mac should put it into your ~/Download folder. Then open up a terminal.

You cd into the download directory. Then you unzip the tgz file. Then you move the folder into directory /usr/local/mongdb

cd ~/Download
$ tar xzf mongodb-osx-x86_64-2.2.3.tgz
$ sudo mv mongodb-osx-x86_64-2.2.3 /usr/local/mongodb

You should now see the mongodb folder with bin and data in the directory /usr/local/mongdb.

data/db folder

By default, MongoDB write/store data into the /data/db folder, you need to create this folder manually and assign proper permission. We make the directory, then check who the current User is. Then give permission to the current user for directory /data/db

$ sudo mkdir -p /data/db
$ whoami

rickytsao

$ sudo chown rickytsao /data/db

Now, the directory /data/db is ready for mongodb data writes.

.bash_profile file

Now we need to open up our .bash_profile and add a PATH entry. This is so that we can run mongod, and mongo from the /usr/local/mongodb/bin directory without having to type out the whole path.

$ cd ~
$ pwd
/Users/rickytsao
$ touch .bash_profile
$ vim .bash_profile

Then type in the following into the .bash_profile file:

export MONGO_PATH=/usr/local/mongodb
export PATH=$PATH:$MONGO_PATH/bin

restart terminal, then:

$ mongo -version

MongoDB shell version: 2.2.3

In terminal 1:

$ mongod

MongoDB starting : pid=34022 port=27017 dbpath=/data/db/ 64-bit host=mkyong.local
//…
waiting for connections on port 27017

In terminal 2:

$ mongo

MongoDB shell version: 2.2.3
connecting to: test

> show dbs

local (empty)

If you happen to get a “rlimits warning”, just type just type “ulimit -n 2048” or use something higher.

Using Mongoose

npm install mongoose –save