Mac 下安裝 MySQL 還是很方便的, 總結來看有2個方法。
方法一：用dmg鏡像安裝
- 安裝
官網下載好 MySQL Mac 版安裝包，常規步驟安裝，安裝過程中會出現如下提示：
2019-03-24T18:27:31.043133Z 1 [Note] A temporary password is generated for root@localhost: TdfRm19!o0Xi
其中TdfRm19!o0Xi是初始密碼，最好先記住！
- 登陸
在終端命令行 登陸mysql:
$ mysql -u root -p
# 輸入上述密碼即可
如果這一步提示: bash: mysql: command not found, 執行下面2個命令做個軟連接即可：
cd /usr/local/bin
ln -fs /usr/local/mysql-8.0.11-macos10.13-x86_64/bin/mysql mysql
- 修改密碼
在 MySQL8.0.4 以前，執行 SET PASSWORD=PASSWORD('新密碼') 即可。但新版本不能這樣改了，因為密碼認證變了。具體步驟可以參考 https://blog.csdn.net/yi247630676/article/details/80352655。
方法二：用 Homebrew 進行安裝
總所周知，Mac 可以利用 homebrew 進行安裝管理，十分方便，如果沒有安裝 homebrew, 可以點擊 https://brew.sh/ 安裝。
下面是 mysql 的安裝方式
$ brew install mysql # 安裝指定版本： brew install mysql@1.1.1
接下來只要等待就可以了，出現下面文字后我們已經很清楚我們需要做什么了：
==> mysql
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 -u root
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
按說明繼續執行，進行初始化操作：
$ myysql_secure_installation
初始化過程中會有很多問題，以下是具體問題部分，以注釋為解釋：
Would you like to setup VALIDATE PASSWORD component?
Press y|Y for Yes, any other key for No: Y ## 回復y 需要密碼8位以上，回復n 則不做限制
The password validation component is not available. Proceeding with the further steps without the component.
Please set the password for root here.
New password: ## 設置你的密碼
Re-enter new password: ## 再次輸入你的密碼
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.
Remove anonymous users? (Press y|Y for Yes, any other key for No) : Y ## 是否移除匿名用戶。考慮安全我選了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.
Disallow root login remotely? (Press y|Y for Yes, any other key for No) : Y ## 是否允許遠程連mysql 的 root。我用做本地調試，不是遠程服務器，所以y了
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.
Remove test database and access to it? (Press y|Y for Yes, any other key for No) : Y ## 是否y了刪除test數據庫，我選了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.
Reload privilege tables now? (Press y|Y for Yes, any other key for No) : y ## 選y, 重新加載權限列表
Success.
All done!
到此配置就結束了，下面我們啟動 mysql 即可，記住以下命令：
$ mysql -u root -p ## 登陸 mysql
$ brew services start mysql@5.7 ## 啟動 mysql
$ brew services stop mysql@5.7 ## 停止 mysql
$ mysql.server start ## 啟動 mysql(無后臺服務)
