No Such File or Directory Error When Running php artisan migrate Locally

First, make sure that you are allowing network access to MySQL in MAMP 

Then, try adding the following key-value pair to the MySQL array in config/database.php.

'unix_socket' => '/Applications/MAMP/tmp/mysql/mysql.sock',

Your MySQL array should now look like this:

'mysql' => [
            'driver' => 'mysql',
            'host' => env('DB_HOST', '127.0.0.1'),
            'port' => env('DB_PORT', '3306'),
            'database' => env('DB_DATABASE', 'forge'),
            'username' => env('DB_USERNAME', 'forge'),
            'password' => env('DB_PASSWORD', ''),
            'charset' => 'utf8mb4',
            'unix_socket' => '/Applications/MAMP/tmp/mysql/mysql.sock',
            'collation' => 'utf8mb4_unicode_ci',
            'prefix' => '',
            'strict' => true,
            'engine' => null,
        ],

You should now be able to run php artisan migrate with no problems!