executing
mysql.server start
Starting MySQL
the following error occurs
. / usr/local/Cellar/mysql@5.6/5.6.40/bin/mysqld_safe: line 637: / usr/local/var/mysql/bluesxgdeMacBook-Air.local.err: No such file or directory
Logging to"/ usr/local/var/mysql/bluesxgdeMacBook-Air.local.err".
/ usr/local/Cellar/mysql@5.6/5.6.40/bin/mysqld_safe: line 138: / usr/local/var/mysql/bluesxgdeMacBook-Air.local.err: No such file or directory
/ usr/local/Cellar/mysql@5.6/5.6.40/bin/mysqld_safe: line 183: / usr/local/var/mysql/bluesxgdeMacBook-Air.local.err: No such file or directory
/ usr/local/Cellar/mysql@5.6/5.6.40/bin/mysqld_safe: line 886: / usr/local/var/mysql/bluesxgdeMacBook-Air.local.err: No Such file or directory
/ usr/local/Cellar/mysql@5.6/5.6.40/bin/mysqld_safe: line 138: / usr/local/var/mysql/bluesxgdeMacBook-Air.local.err: No such file or directory
eror! The server quit without updating PID file (/ usr/local/var/mysql/bluesxgdeMacBook-Air.local.pid).

solve the problem, thank you!