1.从 MySQL 官网 https://www.mysql.com/，找到【DOWNLOADS】 

2.往下拉找到【MySQL Community (GPL) Downloads »】

3.下载社区服务【Community Server】

4.根据自身需求下载版本【此处选择5.7.31】

tips：尽量不要选择rc版本，可能会导致安装后 Navicat 无法连接问题【并且后续使用Java的JDBC和MyBatis等连接数据库也连接不成功】

1.下载完成后，双击打开 mysql-5.7.31-macos10.14-x86_64.dmg，按照步骤操作即可

2.下面这个页面需要把账号密码记录下来，该页面记录了MySQL初始密码，如果记录没了，后续就无法登录MySQL了

3.安装完毕后，在【系统偏好设置】会有一个MySQL的图标

 4.点击启动服务

5.官网说明中：从5.7.18开始不在二进制包中提供my-default.cnf文件【5.7.18前的版本可以检查一下 etc 目录下是否存在，如果 etc 目录下没有 my.cnf，可以找找安装包中有没有提供 my-default.cnf，有的话拷贝到 etc 目录下，并且修改文件名为 my.cnf】

既然官网不再提供，那就需要我们自己去创建啦

通过 command + 空格，输入 terminal.app 打开终端

在 vim 编辑器中点击 i 进入编辑模式【左下角显示为 -INSERT-】，输入以下内容

# Example MySQL config file for medium systems. # # This is for a system with little memory (32M - 64M) where MySQL plays # an important part, or systems up to 128M where MySQL is used together with # other programs (such as a web server) # # MySQL programs look for option files in a set of # locations which depend on the deployment platform. # You can copy this option file to one of those # locations. For information about these locations, see: # http://dev.mysql.com/doc/mysql/en/option-files.html   # # In this file, you can use all long options that a program supports. # If you want to know which options a program supports, run the program # with the "--help" option. # The following options will be passed to all MySQL clients [client] default-character-set=utf8 #password   = your_password port        = 3306 socket      = /tmp/mysql.sock # Here follows entries for some specific programs # The MySQL server [mysqld] character-set-server=utf8 init_connect='SET NAMES utf8 port        = 3306 socket      = /tmp/mysql.sock skip-external-locking key_buffer_size = 16M max_allowed_packet = 1M table_open_cache = 64 sort_buffer_size = 512K net_buffer_length = 8K read_buffer_size = 256K read_rnd_buffer_size = 512K myisam_sort_buffer_size = 8M character-set-server=utf8 init_connect='SET NAMES utf8'

# Don't listen on a TCP/IP port at all. This can be a security enhancement,   # if all processes that need to connect to mysqld run on the same host. # All interaction with mysqld must be made via Unix sockets or named pipes. # Note that using this option without enabling named pipes on Windows # (via the "enable-named-pipe" option) will render mysqld useless! # #skip-networking

# Replication Master Server (default) # binary logging is required for replication log-bin=mysql-bin

# binary logging format - mixed recommended binlog_format=mixed

# required unique id between 1 and 2^32 - 1 # defaults to 1 if master-host is not set # but will not function as a master if omitted server-id   = 1

# Replication Slave (comment out master section to use this) # # To configure this host as a replication slave, you can choose between # two methods : # # 1) Use the CHANGE MASTER TO command (fully described in our manual) - #    the syntax is: # #    CHANGE MASTER TO MASTER_HOST=, MASTER_PORT=, #    MASTER_USER=, MASTER_PASSWORD= ; # #    where you replace , ,  by quoted strings and #     by the master's port number (3306 by default).   # #    Example: # #    CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306, #    MASTER_USER='joe', MASTER_PASSWORD='secret'; # # OR # # 2) Set the variables below. However, in case you choose this method, then #    start replication for the first time (even unsuccessfully, for example #    if you mistyped the password in master-password and the slave fails to #    connect), the slave will create a master.info file, and any later #    change in this file to the variables' values below will be ignored and   #    overridden by the content of the master.info file, unless you shutdown #    the slave server, delete master.info and restart the slaver server. #    For that reason, you may want to leave the lines below untouched #    (commented) and instead use CHANGE MASTER TO (see above) # # required unique id between 2 and 2^32 - 1 # (and different from the master) # defaults to 2 if master-host is set # but will not function as a slave if omitted #server-id       = 2 # # The replication master for this slave - required #master-host     = # # The username the slave will use for authentication when connecting # to the master - required #master-user     = # # The password the slave will authenticate with when connecting to # the master - required #master-password = # # The port the master is listening on. # optional - defaults to 3306 #master-port     = # # binary logging - not required for slaves, but recommended #log-bin=mysql-bin

# Uncomment the following if you are using InnoDB tables #innodb_data_home_dir = /usr/local/mysql/data #innodb_data_file_path = ibdata1:10M:autoextend #innodb_log_group_home_dir = /usr/local/mysql/data # You can set .._buffer_pool_size up to 50 - 80 % # of RAM but beware of setting memory usage too high #innodb_buffer_pool_size = 16M #innodb_additional_mem_pool_size = 2M # Set .._log_file_size to 25 % of buffer pool size #innodb_log_file_size = 5M #innodb_log_buffer_size = 8M #innodb_flush_log_at_trx_commit = 1 #innodb_lock_wait_timeout = 50

[mysqldump] quick max_allowed_packet = 16M

[mysql] no-auto-rehash # Remove the next comment character if you are not familiar with SQL #safe-updates default-character-set=utf8

[myisamchk] key_buffer_size = 20M sort_buffer_size = 20M read_buffer = 2M write_buffer = 2M

[mysqlhotcopy] interactive-timeout

 编辑完成后，点击 esc 进入末行模式，输入法必须是英文模式，输入 :wq 进行保存

6.设置文件权限

7.重启MySQL服务，在【系统偏好设置】-【MySQL】关闭服务，在打开即可

MySQL安装终于大功告成了

1.通过 command + 空格，输入 terminal.app 打开终端

此处只展示终端类型为zsh的方式，如果终端类型为bash，把zshrc改为bash_profile即可，不了解的同学可以看我JDK安装的文章

2.把MySQL的安装bin目录加入到环境变量中，在末尾添加

3.在输入法英文模式下，点击 esc 进入末行模式输入 :wq 保存配置

4.重新读取环境变量

5.使用命令

输入初始密码【输入时，密码不可见，拷贝初始密码后粘贴后直接 enter 即可】，进入 mysql 以后

修改密码【红字为密码，根据自身需求修改】

1：SET PASSWORD FOR 'root'@'localhost' = PASSWORD('yourpassword');

2：FLUSH PRIVILEGES;

然后使用 Navicat 等第三方工具连接 MySQL 后就可以使用MySQL啦

在此处也提供一下卸载方法，如果下载时，真的没有保存到初始密码，可以卸载后在安装一次【一般查看消息也会有记录】

在终端逐行执行以下命令