在Mac OS X10.11安装MySQL(mysql-5.7.10-osx10.10-x86_64.dmg)
1、现在官网下载mysql的dmg文件－－mysql-5.7.10-osx10.10-x86_64.dmg，一路默认安装，在安装类型这一步时点击自定义，把其中的四项全部选中，然后完成安装,安装完成时，会有一个root@localhost的临时密码。
2、打开终端，输入 ps -ef|grep mysql看mysql进程是否存在，如果存在，则可以进行以下操作，
localhost:mysql zhengjj$ /usr/local/mysql/bin/mysql -uroot -p'j41I6Fh%uY6u'
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 5
Server version: 5.7.10
Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> alter user root@'localhost' identified by '123456';
Query OK, 0 rows affected (0.41 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.34 sec)
mysql>
用另一个终端登陆操作：
/usr/local/mysql/bin/mysql -uroot -p123456
//----------------------------------------------------------------------
Mac下Mysql的设置，最新版的10.11+5.6.27
http://flashing.iteye.com/blog/2249631
http://yangjunwei.com/a/1378.html
Mac OS X Mavericks 配置 Apache+Mysql+PHP 详细教程
sudo rm /usr/local/mysql
sudo rm -rf /usr/local/mysql*
sudo rm -rf /Library/StartupItems/MySQLCOM
sudo rm -rf /Library/PreferencePanes/My*
vim /etc/hostconfig (and removed the line MYSQLCOM=-YES-)
rm -rf ~/Library/PreferencePanes/My*
sudo rm -rf /Library/Receipts/mysql*
sudo rm -rf /Library/Receipts/MySQL*
sudo rm -rf /var/db/receipts/com.mysql.*