1.进入官网下载MySQL5.7的安装包。
下载地址：https://www.mysql.com/downloads/
跟着上面图示下载即可，我这里选择的是5.7.31的版本，根据个人喜好选择版本，但是注意有的版本是没有mac版本的，换个版本就行了。
2.安装包下载完成后双击pkg文件进行安装，无脑点下一步即可，注意安装完成后记得保存最后弹出框的密码，如下图所示：
红色框的内容就是需要保存的，这是你mysql root账号的密码。
3.进入系统设置，找到mysql，开启mysql服务，如图所示：
出现下面图示情况就是mysql服务开启成功
4.打开终端，输入“sudo vim /etc/my.cnf”，在弹出的编辑器中按键盘的 i键进入编辑模式，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，然后将输入法设置为英文模式，输入:wq回车保存(注意wq前面的冒号也需要输入)。
5.设置文件权限
打开终端，输入“sudo chmod 664 /etc/my.cnf”，在系统设置中重启mysql服务，到此mysql安装大功告成。
注：我也不清楚第四步和第五步是在干什么，个人也是网上借鉴的别人的做法，多做这两步也不吃亏。
6.配置mysql环境变量。
打开终端，输入“open -e .bash_profile”回车，在弹出的文本编辑框内加入下面的代码，保存退出。
PATH=$PATH:/usr/local/mysql-5.7.31-macos10.14-x86_64/bin
7.在终端使用“source .bash_profile”命令，使配置生效。
8.在终端中使用“mysql -uroot -p”命令，然后提示要求输入密码(输入时密码不可见，不要以为没有输入上，把上面记录下来的密码复制粘贴直接回车即可)。
进入mysql后可以依次使用下面的命令修改密码（红色部分为需要修改的密码，根据个人喜好修改）：
SET PASSWORD FOR 'root'@'localhost' = PASSWORD('yourpassword');
FLUSH PRIVILEGES;
到此为止所有配置都完成，可以使用Navicat等第三方工具连接Mysql进行使用了。
最后注意：如果终端关闭重新打开，是不可以直接使用“mysql -uroot -p”命令进入mysql的，需要在此之前使用一次“source .bash_profile”命令，所以mysql环境配好后，建议使用第三方工具进行数据库相关操作。
标签：buffer,步骤,MySQL5.7,innodb,Mac,master,mysql,MASTER,size From： https://www.cnblogs.com/linlin2127/p/17383255.html