x.txt

$ brew install mysql
$ mysql --version
mysql  Ver 14.14 Distrib 5.7.20, for osx10.12 (x86_64) using  EditLine wrapper

$ mysql.server start
Starting MySQL
. SUCCESS

$ mysql -u root
mysql> SHOW VARIABLES LIKE "%version%";
+-------------------------+-----------------------+
| Variable_name           | Value                 |
+-------------------------+-----------------------+
| innodb_version          | 5.7.20                |
| protocol_version        | 10                    |
| slave_type_conversions  |                       |
| tls_version             | TLSv1,TLSv1.1,TLSv1.2 |
| version                 | 5.7.20                |
| version_comment         | Homebrew              |
| version_compile_machine | x86_64                |
| version_compile_os      | osx10.12              |
+-------------------------+-----------------------+
8 rows in set (0.01 sec)

mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('a06e8b39');
Query OK, 0 rows affected, 1 warning (0.00 sec)

mysql> create database test_db;
Query OK, 1 row affected (0.00 sec)

$ cat /usr/local/etc/my.cnf
# Default Homebrew MySQL server config
[mysqld]
# Only allow connections from localhost
bind-address = 127.0.0.1

MySQL Workbenchから接続テスト
→接続成功
https://i.imgur.com/yLGWkkb.png

C#から接続テスト
→接続成功
https://i.imgur.com/HtaYWKb.jpg