I am running these simple commands on mac: 

```
brew upgrade mongodb 

```

or

```
brew install mongodb

```

I am getting this error below: 

> 
> Error: mongodb: unknown version :mountain\_lion
> 
> 
> 

If i run the simple command: mongo , i get this

MongoDB shell version v4.0.3

But then I get an error saying couldn't connect to server

-- worth to note, I was playing around with the command line last night and somehow deleted all of my databases from mongodb on my machine(i think). I continuously get the above error when trying install and/or update mongodb.

I am "new" to mongoDB, but I have created a few full stack projects using it over the last 5-6 months. Not sure what I did, but I also can't run node db/seeds.js either as I get errors, even though I have the data in my vscode projects. 

Thanks for the help.