terminal 켜고
brew search mongodb
brew tap mongodb/brew
brew search mongodb
brew install mongodb-community@4.2

brew services start mongodb/brew/mongodb-community@4.2

brew services list

mongo

brew services stop mongodb/brew/mongodb-community@4.2

zsh: command not found: mongo
위에 설치할 때 나왔던 메세지를 보면 아래와 같은 메세지를 볼 수 있다.

echo 'export PATH="/opt/homebrew/opt/mongodb-community@4.2/bin:$PATH"' >> ~/.zshrc
시키는데로 한다.
source ~/.zshrc
mongo

환경변수 확인하려면,
vi ~/.zshrc

끝.