Why can't I update to the latest MongoDB with Homebrew?

Question

On my mac, I have installed the mongoDB(version 2.0.2) using Homebrew. I want to use 'aggregate' function but it is only available from version 2.2 so for that I update the mongoDB using the following code:

 brew upgrade mongodb

But I get the following error:

Error: mongodb already upgraded

How can I install the latest version of MongoDB?

Answer 1

First of all, you have to update your Homebrew to the current version with the help of the following command:

brew update

After that you will have to update the MongoDB:

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brew upgrade mongodb