安装：
1.使用homebrew下载rabbitMQ:
brew install rabbitmq
执行结果如下：
Updating Homebrew...
==> Auto-updated Homebrew!
Updated tap (homebrew/core).
==> Updated Formulae
cake dockviz kubeless sdcc
==> Renamed Formulae
geth -> ethereum Error: Could not link:
/usr/local/share/doc/homebrew Please delete these paths and run `brew update`.
==> Installing dependencies for rabbitmq: jpeg, libpng, libtiff, wxmac, erlang
==> Installing rabbitmq dependency: jpeg
==> Downloading https://homebrew.bintray.com/bottles/jpeg-9c.high_sierra.bottle.
######################################################################## 100.0%
==> Pouring jpeg-9c.high_sierra.bottle.tar.gz