问题
brew安装失败。
gongzhihaodeMacBook-Pro:homebrew-core gongzhihao$ brew install mongodb -v
Updating Homebrew...
--
^CError: No available formula with the name "mongodb" //仓库没有软件
==> Searching for a previously deleted formula (in the last month)...
Warning: homebrew/core is shallow clone. To get complete history run:
git -C "$(brew --repo homebrew/core)" fetch --unshallow
Error: No previously deleted formula found.
==> Searching for similarly named formulae...
Error: No similarly named formulae found.
==> Searching taps...
==> Searching taps on GitHub...
Error: No formulae found in taps.
gongzhihaodeMacBook-Pro:homebrew-core gongzhihao$
原因
因为现在非开源，仓库没有。
解决方法
设定
$ brew tap mongodb/brew
安装
安装MongoDB社区服务器的最新可用生产版本（包括所有命令行工具）。这将安装MongoDB 4.2.x：
$ brew install mongodb-community
但是mongodb官网下载极慢，基本上下载不了。解决方法？使用迅雷下载。
