Read-only file system when attempting mkdir /data/db on Mac [closed]

If you have Mac and updated to Catalina than the root folder is no longer writable.

I just changed the directory somewhere else.

Been using this command for now

mongod --dbpath=/Users/user/data/db

from the official docs https://docs.mongodb.com/manual/tutorial/install-mongodb-on-os-x/

install homebrew and run the following commands

sudo chown -R $(whoami) $(brew --prefix)/*

then

brew tap mongodb/brew

then

brew install mongodb-community@4.2

and

brew services start mongodb-community

or

mongod --config /usr/local/etc/mongod.conf

then

ps aux | grep -v grep | grep mongod

and

mongo

to verify you can run show dbs in the mongo shell

With the new macOS Catalina update, the folder /data/db becomes read-only, you cannot modify it. Follow this procedure to create a DB in another folder:

1. Change mongod directory :

   sudo mongod --dbpath /System/Volumes/Data/data/db

2. Give it an alias to use it as mongod:

   alias mongod="sudo mongod --dbpath /System/Volumes/Data/data/db"

3. Just type mongod in your terminal, it should work.

Extra => If you need to give it current user rights, use this line of code :

sudo chown -R $(whoami) /System/Volumes/Data/data/db

(Just for info -> $(whoami) is just a variable that returns your current user)