Do you ever encountered an error while running drupal command inside drupal root directory where you using MAMP as your development stack?
$ drupal [PDOException] SQLSTATE[HY000]  No such file or directory
OR while trying to connect mysql client with mysql server run by MAMP or MAMP Pro?
$ mysql -u root -ppassword ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)
This is because drupal console or mysql client try to connect to mysql server by default location of mysql socket file which is supposed to exist at /tmp/mysql.sock
But mysql server run by MAMP create this socket file at /Applications/MAMP/tmp/mysql/mysql.sock location which is different from default expected mysql socket file
Simply create a symlink to this mysql socket file under /tmp/ directory.
$ ln -s /Applications/MAMP/tmp/mysql/mysql.sock /tmp/mysql.sock
BOOM! now you can run drupal console or mysql command.