Now create a Mongo data directory, This directory is where MongoDB stores database files, using the command:. After updating Homebrew install MongoDB by running the command: brew install mongodb. Brew update and check the updated version using brew -v. If you are not able to install it, try Homebrew Installation by running the command. Run command in your terminal to check if Homebrew is already installed: brew -v. Homebrew is a package manager which is used to install other software/packages on Mac It is like apt-get in Linux OS. Open a new terminal and check if Homebrew is already installed on your computer. How to install MongoDB on MAC OS X Install and update Homebrew – a package manager This is different than SQL databases, Relational databases, like PostgreSQL, MySQL and, where fields correspond to columns in a table and individual records correspond to rows. Values in documents can be looked up by their field’s key and can be easily added/updated anytime which makes Mongo extremely flexible. The document is a data structure composed of field and value pairs. In MongoDB, records are documents that behave a lot like JSON objects in JavaScript but use a variant called Binary JSON (BSON) that accommodates more data types. Its document-oriented data model makes it easier to split up data across multiple servers. 
MongoDB is an open-source document database that belongs to a family of databases called NoSQL – not only SQL and provides high performance, high availability, and automatic scaling.
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