转： [mac安装mysql的两种方法（含配置)]http://www.jianshu.com/p/fd3aae701db9
1.修改默认密码
前提： 配置好 mysql 环境变量
// 配置 MySQL 环境变量
$ vi ~/.bash_profile
export MYSQL_HOME=/usr/local/mysql
export PATH=$PATH:$MYSQL_HOME/bin
$ source ~/.bash_profile
// 需要 MySQL 服务在运行状态执行
$ cd /usr/local/mysql/bin
$ SET PASSWORD FOR 'root'@'localhost' = PASSWORD('123456');
2.MySql 的启动，停止和状态
$ cd /usr/local/mysql
// 启动
$ sudo ./support-files/mysql.server start
// 重启
$ sudo support-files/mysql.server restart
// 停止
$ sudo support-files/mysql.server stop
// 检查 MySQL 运行状态
$ sudo support-files/mysql.server status
3.查看数据库
$ cd /usr/local/mysql/bin
$ ./mysql -u root -p
输入修改后的密码
// 使用数据库
mysql> use mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
4 rows in set (0.00 sec)
mysql 备注：
a.删除 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.*
b.更改 mysql 安装目录所属用户与用户组:
cd /usr/local
sudo chown -R root:wheel mysql
c.切换到 mysql 安装目录并执行初始化命令并记录生成的临时 root 密码:
cd /usr/local/mysql
sudo bin/mysqld --initialize --user=mysql
d.mysql的 Root 权限设置
