MongoDB expects the Data/data/db folders to be in a location which Mac OS Catalina does not allow. As a consequence the folders must be placed elsewhere, on one of the disk volumes. But modifying the MongoDB settings to find the new data folders is not working properly. There are many supposed solutions for this in various places on the web but none of them have solved my issues. A word of warning: If you want to do a clean install of Big Sur or Catalina and are already running Catalina the process is different to earlier versions of macOS. You will now find two volumes to.

In this tutorial I am going to talk about how you can install MongoDB on MacOS in an easy way. I have gone through many tutorials online, but I have been really upset with those tutorials. Most of the tutorials are outdated and old. So I decided to create this tutorial in which i can show you a better and easy way to setup MongoDB on MacOS.

Install MongoDB on MacOS using Homebrew

In order to install MongoDB on MacOs, I would suggest using Homebrew.

Please open up the MacOs command line tool and paste the following command to setup MongoDB on MacOS.

Once you entered the given above command, your MacOS terminal will start some process. Those processes are nothing but related to creating some folder in your local machine where all the Homebrew related settings are kept.

After finishing the installation process, check your Homebrew dependencies.

Hit the below commands to install MongoDB

After MongoDB successfully installed in your machine, then create a folder to store MongoDB data using given below command

Use the given below command to assign the proper permission to MongoDB data folder.

We’ve successfully installed the MongoDB on MacOS also assigned the proper permission. Now it’s time to run mongo daemon service. This service makes the connection and performs the task in the background. Hit the following command to run MongoDB.

Now your apps are all set to communicate with MongoDB. Mongo is correctly working in the background with the help of mongo daemon. You might also check which MongoDB version you are working on, just hit the below command in the terminal.

mongo --version output

Install Mongodb Macos Catalina Update

Above command will tell you which MongoDB version is running in your local machine. Using the latest version has always been a good practice. It protects you from compatibility chaos with client-side app.

However, if you are using latest Mac version Catalina then the root folder is no longer writable.

Brew has an updated version of mongodb to use a new path (which it creates itself), /usr/local/var/mongodb and following these instructions will fix the issue:

Install Mongodb Macos Catalina

Follow the link to install and update mongodb-community-edition