Installing MongoDB on OS X

First grab the binary from this page:
http://www.mongodb.org/downloads
Extract to /opt/ and add the bin path to your .profile
Create /data/db dir
Give it the right ownership
chown /data/db</p>
<p>
Now we can startup:
mongod &
Now the PHP driver (XCode required)
sudo pecl install mongo
Then add the following line to your php.ini file:
extension=mongo.so
Done