参考:mac安装mysql8
按照上面这个安装啥毛病没有。版本：8.0.31，官方下载。我自己没有删除data，只是创建了my.cnf粘贴了内容。
1.在安装目录下创建文件my.cnf
cd /usr/local/mysql-8.0.31-macos12-x86_64/support-files
sudo touch my.cnf
vi my.cnf
2.my.cnf编辑
指令
i //进入编辑模式
command+v //粘贴内容
esc //退出编辑模式
:wq //保存
my.cnf内容
# Example MySQL config file for small systems.
#
# This is for a system with little memory (<= 64M) where MySQL is only used
# from time to time and it's important that the mysqld daemon
# doesn't use much resources.
#
# 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 = 3336
socket = /tmp/mysql.sock
# Here follows entries for some specific programs
# The MySQL server
[mysqld]
default-storage-engine=INNODB
character-set-server=utf8
collation-server=utf8_general_ci
port = 13306 # 我修改了默认端口
socket = /tmp/mysql.sock
lower_case_table_names = 1 # 是否对sql语句大小写敏感，1表示不敏感，即不区分大小写
skip-external-locking
key_buffer_size = 16K
max_allowed_packet = 1M
table_open_cache = 4
sort_buffer_size = 64K
read_buffer_size = 256K
read_rnd_buffer_size = 256K
net_buffer_length = 2K
thread_stack = 256K # 该字段根据需要修改，默认是128K，我的是因为启动报了这个字段的错导致启动失败，所以我改成256K了
# 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
# (using the "enable-named-pipe" option) will render mysqld useless!
#
#skip-networking
server-id = 1
# Uncomment the following if you want to log updates
#log-bin=mysql-bin
# binary logging format - mixed recommended
#binlog_format=mixed
# Causes updates to non-transactional engines using statement format to be
# written directly to binary log. Before using this option make sure that
# there are no dependencies between transactional and non-transactional
# tables such as in the statement INSERT INTO t_myisam SELECT * FROM
# t_innodb; otherwise, slaves may diverge from the master.
#binlog_direct_non_transactional_updates=TRUE
# 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
[myisamchk]
key_buffer_size = 8M
sort_buffer_size = 8M
[mysqlhotcopy]
interactive-timeout
3.设置
系统偏好设置>>mysql>>configuration>>勾选填写/usr/local/mysql/support-files/my.cnf
系统偏好设置>>mysql>>Initailize Database>>勾选load configuration file
问题
1. Navicat连接2002 - Can't connect to server on '127.0.0.1' (36)
这个就直接重新安装，选择第二项弱密码。
2. command not found: mysql
/usr/local/bin路径下面缺少mysql所致，它本身是mysql-8.0.31-macos12-x86_64，复制了这个内容是一样的。估计改名也是一条路，不过得把偏好设置那个引用路径也改了。或者安装的时候改名啥的。再或者环境变量设置这个名字，他自己本身configuration也用这个路径估计就不用复制mysql。大体就是路径问题。
cd /usr/local/bin
sudo ln -fs /usr/local/mysql/bin/mysql mysql
3.ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
启动一下MySQL，如果启动了就cd /tmp,rm mysql.sock把这个删了重启。
启动就在偏好设置里，最下面有图标点进去就行。
4.ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
不配置my.conf的话，进来就是这个问题。密码错误，刚进来用安装设置的那个密码不行就这样了。踩了一圈坑，重置密码那个又会导致port连不上。会有以下结果
mysql> show global variables like 'port'; //port--0
mysql> show variables like 'skip_networking'; //on
得去删除skip_networking，这个大概在data或者support-files 的某个地方，我也没找到。总之很麻烦。