Mac Os下安装mysql

1、使用brew安装

>  brew install mysql

==> Downloading https://downloads.sf.net/project/machomebrew/Bottles/mysql-5.5.28.mountainlion.bottle.tar.gz
Already downloaded: /Library/Caches/Homebrew/mysql-5.5.28.mountainlion.bottle.tar.gz
==> Pouring mysql-5.5.28.mountainlion.bottle.tar.gz
==> Caveats
Set up databases to run AS YOUR USER ACCOUNT with:
    unset TMPDIR
    mysql_install_db --verbose --user=`whoami` --basedir="$(brew --prefix mysql)" --datadir=/usr/local/var/mysql --tmpdir=/tmp


To set up base tables in another folder, or use a different user to run
mysqld, view the help for mysqld_install_db:
    mysql_install_db --help


and view the MySQL documentation:
  * http://dev.mysql.com/doc/refman/5.5/en/mysql-install-db.html
  * http://dev.mysql.com/doc/refman/5.5/en/default-privileges.html


To run as, for instance, user "mysql", you may need to `sudo`:
    sudo mysql_install_db ...options...


A "/etc/my.cnf" from another install may interfere with a Homebrew-built
server starting up correctly.


To connect:
    mysql -uroot
==> Caveats
To have launchd start mysql at login:
    ln -sfv /usr/local/opt/mysql/*.plist ~/Library/LaunchAgents
Then to load mysql now:
    launchctl load ~/Library/LaunchAgents/homebrew.mxcl.mysql.plist
Or, if you don't want/need launchctl, you can just run:
    mysql.server start
==> Summary

/usr/local/Cellar/mysql/5.5.28: 6386 files, 209M

2、按照上面的提示信息一步步执行

>  unset TMPDIR
>  mysql_install_db --verbose --user=`whoami` --basedir="$(brew --prefix mysql)" --datadir=/usr/local/var/mysql --tmpdir=/tmp
Installing MySQL system tables...
OK
Filling help tables...
OK


To start mysqld at boot time you have to copy
support-files/mysql.server to the right place for your system


PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
To do so, start the server, then issue the following commands:


/usr/local/opt/mysql/bin/mysqladmin -u root password 'new-password'
/usr/local/opt/mysql/bin/mysqladmin -u root -h hostname password 'new-password'


Alternatively you can run:
/usr/local/opt/mysql/bin/mysql_secure_installation


which will also give you the option of removing the test
databases and anonymous user created by default.  This is
strongly recommended for production servers.


See the manual for more instructions.


You can start the MySQL daemon with:
cd /usr/local/opt/mysql ; /usr/local/opt/mysql/bin/mysqld_safe &


You can test the MySQL daemon with mysql-test-run.pl
cd /usr/local/opt/mysql/mysql-test ; perl mysql-test-run.pl


Please report any problems with the /usr/local/opt/mysql/scripts/mysqlbug script!

3、启动

>   mysql.server start
Starting MySQL
.. SUCCESS!

4、设置

> /usr/local/opt/mysql/bin/mysqladmin -u root password '123456'

5、登陆

> /usr/local/opt/mysql/bin/mysql -uroot -p123456