使用brew安裝，不過brew不再更新，

通過

sudo chown -R $(whoami):admin /usr/local

　　這條語句終端有提醒的

xcode-select --install

　　需要安裝這個xcode-select

brew install mongodb
sed: .git/GITHUB_HEADERS: No such file or directory
==> Downloading https://homebrew.bintray.com/bottles-portable/portable-ruby-2.3.3.leopard_64.bottle.1.tar.gz
######################################################################## 100.0%
==> Pouring portable-ruby-2.3.3.leopard_64.bottle.1.tar.gz
==> Auto-updated Homebrew!
Updated 2 taps (homebrew/core, homebrew/versions).

　　打算通過brew 安裝mongodb，從而自動更新了ruby版本以及Homebrew的版本，然後再次執行

brew install mongodb

　　就可以了

==> Pouring mongodb-3.4.9.sierra.bottle.tar.gz

==> Caveats

To have launchd start mongodb now and restart at login:

brew services start mongodb

Or, if you don‘t want/need a background service you can just run:

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

//啟動mongodb服務

brew services start mongodb

//瀏覽器

http://localhost:27017

顯示

It looks like you are trying to access MongoDB over HTTP on the native driver port.

證明安裝成功了

//配置mongodb

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

mac 下 安裝 mongodb