Install failed, Mac won’t shut down

1)Mac OS X v.10.4.7 on MacMini 1.66Intel Core Duo @ 512 MB DDR2 SDRAM
2)Downloaded
3)Changed wp-config.php (name and password concealed):
‘<?php
// ** MySQL settings ** //
define(‘DB_NAME’, ‘*********’); // The name of the database
define(‘DB_USER’, ‘Robyn’); // Your MySQL username
define(‘DB_PASSWORD’, ‘**********’); // …and password
define(‘DB_HOST’, ‘localhost’); // 99% chance you won’t need to change this value’

4) tried to launch install on Safari and got text file:
‘<?php
define(‘WP_INSTALLING’, true);
if (!file_exists(‘../wp-config.php’))
die(“There doesn’t seem to be a wp-config.php file. I need this before we can get started. Need more help? We got it. You can create a wp-config.php file through a web interface, but this doesn’t work for all server setups. The safest way is to manually create the file.”);’
…..etc. (will not launch in Safari)

5) Also, now Mac will not soft-boot power down (have to physically hold down power button to cold boot down.

HELP!