在mac上安装软件，无疑安装一个brew是个很好的选择，关于brew是什么，怎么安装建议去brew官网查看，
附上地址：brew官网 还有一篇博文 http://www.cnblogs.com/xd502djj/p/6923690.html
安装完成之后，安装其他的软件就很方便了。
先搜索下
cmd:~ dongjunjie$ brew search mysql
automysqlbackup mysql++ mysql-connector-c mysql-sandbox mysql-utilities mysql@5.6
mysql mysql-cluster mysql-connector-c++ mysql-search-replace mysql@5.5 mysqltuner
caskroom/cask/mysql-connector-python caskroom/cask/mysql-shell caskroom/cask/navicat-for-mysql
caskroom/cask/sqlpro-for-mysql
决定安装5.6
cmd:~ dongjunjie$ brew install mysql@5.6
Updating Homebrew...
==>Auto-updated Homebrew!
Updated 1 tap (homebrew/core).
==>New Formulae
grakn
==>Updated Formulae
ammonite-repl conan git-town lablgtk mariadb@10.1 notmuch paket sqlmap
ansible django-completion imake libgcrypt metricbeat npth rancher-cli terragrunt
aws-sdk-cpp filebeat jhipster libvirt mono ntopng re2
awscli freeradius-server kibana lmdb mtr packetbeat sourcery
==>Downloading https://homebrew.bintray.com/bottles/mysql@5.6-5.6.36_1.sierra.bottle.tar.gz
######################################################################## 100.0%
==>Pouring mysql@5.6-5.6.36_1.sierra.bottle.tar.gz
==>Using the sandbox
==>/usr/local/Cellar/mysql@5.6/5.6.36_1/bin/mysql_install_db --verbose --user=dongjunjie --basedir=/usr/local/Cellar/mysql@5.6/5.6.36_1 --datadir=/usr/local/var/mysql --tmpdir=/t
==>Caveats
A "/etc/my.cnf" from another install may interfere with a Homebrew-built
server starting up correctly.
MySQL is configured to only allow connections from localhost by default
To connect:
mysql -uroot
This formula is keg-only, which means it was not symlinked into /usr/local,
because this is an alternate version of another formula.
If you need to have this software first in your PATH run:
echo 'export PATH="/usr/local/opt/mysql@5.6/bin:$PATH"' >> ~/.bash_profile
For compilers to find this software you may need to set:
LDFLAGS: -L/usr/local/opt/mysql@5.6/lib
CPPFLAGS: -I/usr/local/opt/mysql@5.6/include
To have launchd start mysql@5.6 now and restart at login:
brew services start mysql@5.6
Or, if you don't want/need a background service you can just run:
/usr/local/opt/mysql@5.6/bin/mysql.server start
==>Summary
/usr/local/Cellar/mysql@5.6/5.6.36_1: 346 files, 154.2MB
上面会告诉你的很清楚 ，如果现在启动并让其开机启动如下操作
To have launchd start mysql@5.6 now and restart at login:
brew services start mysql@5.6
否则，如果不想做后段服务启动动可以这样
Or, if you don't want/need a background service you can just run:
/usr/local/opt/mysql@5.6/bin/mysql.server start
