MySQL 社區辦下載地址
至於下載什麼版本，看着大小差不多其實都行。
我下載的是第一個安裝版，一路下一步即可。裝好後有個提示千萬別立刻關閉，這邊沒有截圖，這是生成的一串初始密碼。
2020-06-01T22:21:33.313881Z 1 [Note] A temporary password is generated for root@localhost: WFoU(uDvI1Ir
If you lose this password, please consult the section How to Reset the Root Password in the MySQL reference manual.
我們打開終端， 可以通過terminal去修改密碼了。
MacBook-Pro:local xuzhijie$ export PATH=$PATH:/usr/local/mysql/bin
MacBook-Pro:local xuzhijie$ vi ~/.bash_profile
MacBook-Pro:local xuzhijie$ mysql -u root -p
Enter password: WFoU(uDvI1Ir
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 159
Server version: 5.7.29
Copyright (c) 2000, 2020, 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> show databases;
ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.
這邊你一上來用初始密碼進去執行命令，它會核善地提醒你你需要reset你的密碼。
那麼接着就在mysql裏面執行下面的命令
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'password';
Query OK, 0 rows affected (0.00 sec)
那麼現在你的新密碼就是password了。