以下內容都是控制欄的東西，關鍵點我會用漢語解釋，大家看程式碼照著我的做就可以正確安裝。

提醒：安裝MySQL時候等待時間過長問題

Updating Homebrew等待時間過長或者

解決方案： export HOMEBREW_NO_AUTO_UPDATE=true

慢慢看下面程式碼，需要注意的地方我漢語都翻譯了

MAC安裝MySQL方法

這裡下載MySQL 8.0.12，輸入brew install mysql就可以安裝了
appledeMBP:~ apple$ brew install mysql



==> Downloading https://homebrew.bintray.com/bottles/mysql-8.0.12.sierra.bottle.
Already downloaded: /Users/apple/Library/Caches/Homebrew/mysql-8.0.12.sierra.bottle.tar.gz
==> Pouring mysql-8.0.12.sierra.bottle.tar.gz



==> Caveats  #這個版本的MySQL沒有密碼，想要密碼的輸入    mysql_secure_installation
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
?  /usr/local/Cellar/mysql/8.0.12: 255 files, 233.3MB


下載完畢，啟動MySQL
appledeMBP:~ apple$ mysql.server start





Starting MySQL
. SUCCESS! 
appledeMBP:~ apple$ mysql_secure_installation

Securing the MySQL server deployment.

Connecting to MySQL using a blank password.

VALIDATE PASSWORD COMPONENT can be used to test passwords
and improve security. It checks the strength of password
and allows the users to set only those passwords which are
secure enough. Would you like to setup VALIDATE PASSWORD component?



你要設定有效密碼嗎？是的，輸入y，回車
Press y|Y for Yes, any other key for No: y




There are three levels of password validation policy:

LOW    Length >= 8
MEDIUM Length >= 8, numeric, mixed case, and special characters
STRONG Length >= 8, numeric, mixed case, special characters and dictionary                  file


三種級別的密碼，最低八位數，輸入0
Please enter 0 = LOW, 1 = MEDIUM and 2 = STRONG: 0
Please set the password for root here.

New password: 輸入密碼

Re-enter new password: 重新輸入

Estimated strength of the password: 50 
Do you wish to continue with the password provided?(Press y|Y for Yes, any other key for No) : y
By default, a MySQL installation has an anonymous user,
allowing anyone to log into MySQL without having to have
a user account created for them. This is intended only for
testing, and to make the installation go a bit smoother.
You should remove them before moving into a production
environment.


問你是否刪除預設的無密碼使用者，我選擇刪除，y
Remove anonymous users? (Press y|Y for Yes, any other key for No) : y
Success.


Normally, root should only be allowed to connect from
'localhost'. This ensures that someone cannot guess at
the root password from the network.



不允許遠端訪問嗎？我回復y
Disallow root login remotely? (Press y|Y for Yes, any other key for No) : y 
Success.

By default, MySQL comes with a database named 'test' that
anyone can access. This is also intended only for testing,
and should be removed before moving into a production
environment.

移除測試資料庫，回答y
Remove test database and access to it? (Press y|Y for Yes, any other key for No) : y
 - Dropping test database...
Success.

 - Removing privileges on test database...
Success.
Reloading the privilege tables will ensure that all changes
made so far will take effect immediately.



重新下載資料表確保所有的更改可以立即生效，回覆y

Reload privilege tables now? (Press y|Y for Yes, any other key for No) : y
Success.

All done! 

搞定了輸入mysql -u root -p測試下
appledeMBP:~ apple$ mysql -u root -p
Enter password: 輸入密碼
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 10
Server version: 8.0.12 Homebrew 

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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.

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