在mac OX10.11.6上安装MySQL

一、之前失败情况

　　官网下载dmg文件安装、源码安装，下过5.6  5.7  8.0 版本，都可以安装成功，但是在电脑设置界面无法启动，每次点启动输入密码后，均闪一下绿色然后变红色，既然不能界面启动，那就使用终端试试，结果就是长时间的不停解决各种问题：不能连接到数据库的服务啦、找不到mysql.sock文件啦、PID错误啊等等等等，看过网上各种方式：kill已有mysql进程、新建/修改my.cnf文件、修改配置路径等等等等，数据库也是不断卸载、安装，均已失败告终。

二、完全卸载mysql

　　在安装之前，一定要完全卸载mysql，并删除相关的各种文件，依次运行以下语句：（如果不是root用户需要在前面加上sudo，也可使用sudo su -进行root）

mymac:~ root# rm -rf /usr/local/mysql*

mymac:~ root# rm -rf /Library/StartupItems/MySQLCOM

mymac:~ root# rm -rf /Library/PreferencePanes/My*

mymac:~ root# rm -rf ~/Library/PreferencePanes/My*

mymac:~ root# rm -rf /Library/Receipts/mysql*

mymac:~ root# rm -rf /Library/Receipts/MySQL*

mymac:~ root# rm -rf /var/db/receipts/com.mysql.*

三、使用brew安装

　　安装brew并更新：（可参考官网：https://brew.sh/）

p.p1 { margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px "Andale Mono"; color: #75b900; background-color: #252525 }
span.s1 { }

mymac:~ root# /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

p.p1 { margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px "Andale Mono"; color: #75b900; background-color: #252525 }
span.s1 { }

mymac:~ root# brew update

　　安装mysql：

不能使用root用户安装，会报错：

p.p1 { margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px "Andale Mono"; color: #75b900; background-color: #252525 }
span.s1 { }
span.s2 { text-decoration: underline; color: #dc4f33 }

p.p1 { margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px "Andale Mono"; color: #75b900; background-color: #252525 }
p.p2 { margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px "Andale Mono"; color: #ff871a; background-color: #252525 }
p.p3 { margin: 0.0px 0.0px 0.0px 0.0px; font: 14.0px "Andale Mono"; color: #75b900; background-color: #252525; min-height: 16.0px }
span.s1 { }
span.s2 { color: #7248fe }
span.s3 { color: #75b900 }

mymac:~ mymac$ brew install mysql

Updating Homebrew...

==> Downloading https://homebrew.bintray.com/bottles/mysql-5.7.22.el_capitan.bot

Already downloaded: /Users/mymac/Library/Caches/Homebrew/mysql-5.7.22.el_capitan.bottle.tar.gz

==> Pouring mysql-5.7.22.el_capitan.bottle.tar.gz

==> Caveats

We've installed your MySQL database without a root password. To secure it run:

mysql_secure_installation

MySQL is configured to only allow connections from localhost by default

To connect run:

mysql -uroot

To have launchd start mysql now and restart at login:

brew services start mysql

Or, if you don't want/need a background service you can just run:

mysql.server start

==> Summary