Run the Mongo daemon, in one of your terminal windows run mongod. Subsequently, question is, how do I start MongoDB on Mac? Install and Run MongoDB with Homebrew Open the Terminal app and type brew update. Or, open a Command Interpreter with Administrative privileges and run: 'C:Program '.

From Windows Explorer/File Explorer, go to C:Program FilesMongoDBServer4.2in directory and double-click on mongo.exe.If You Installed MongoDB as a Windows Service The mongo logs can be found at /usr/local/var/log/mongodb/.The databases are stored in the /usr/local/var/mongodb/ directory.Hopefully this saves someone a few hours – I wasted way too much time on the issue. I changed the dbPath value to the following and copied my existing DB files into the folder: dbPath: /System/Volumes/Data/data/dbįinally, I made sure my account had the proper access to the folder by running chown (something I had tried many times earlier but on a folder outside of /System/Volumes/Data): sudo chown -R $USER /System/Volumes/Data/data/dbĪfter that I was able to start MongoDB and everything was back to normal. Note that it’s possible yours may be located in a different location based on how you installed MongoDB. I then went into the MongoDB config file at /usr/local/etc/nf. I ran the following commands to install the latest version of MongoDB using Homebrew (see for more details): brew tap mongodb/brew The MongoDB files can then go at: /System/Volumes/Data/data/db That wasn’t the problem on my machine.Īfter doing more research I found out that Catalina added a new volume to the hard drive and creates a special folder where the MongoDB files need to go. I found a lot of posts with the same issue but they all solved it by changing security on the folder. But, try as I might I still saw the read-only folder error when trying to start the server….very frustrating. I tried every chmod and chown command known to man and woman kind, tried manually changing security in Finder, compared security to my other iMac (they were the same), and tried a bunch of other things as well. Running the following command resulted in an error about the data/db directory being read-only: mongod -auth After starting an application I’m building I quickly realized that I couldn’t get MongoDB to start. The migration went really well overall and within a few hours I had my development machine up and running. I recently bought a new iMac and moved all of my files over using Time Machine.

Mac install mongodb