installation of 3.2.1 on Mac os x Lion

I don't have any experience with Mac os X Lion, so I can not say MediaMosa works. But then again, I don't see any reason why it shouldn't.

If the LUA console test works and the installation halts on LUA, then there must be a difference between calling LUA from PHP and your console test. LUA is run using 'exec' PHP command. Under Linux, this PHP command will be run under the user of Apache / ngnix webserver, will be 'www-data' user in most cases. Pretty sure that under os X is the same or similar.

The first thing I would check are the logs of your webserver, and the php.log if you can find it. The second thing; what user is PHP using and does it have rights enough to run LUA. I have no idea if os X needs execute privileges for running LUA under PHP.

These lines are run during the install to test LUA (this is the standaard lua test);

$exec_output = array();
$ret_val = 0;
exec('lua ' . escapeshellcmd(DRUPAL_ROOT) . '/profiles/mediamosa_profile/lua/lua_test 2>&1', $exec_output, $ret_val);

The DRUPAL_ROOT value is the root dir of your Drupal installation. If you have any PHP knowledge, then you could create PHP script to test more directly why this 'exec' command tells you it doesn't work.

You could create a PHP file and paste & save (e.g. luatest.php);

<?php
$exec_output = array();
$ret_val = 0;
exec('lua [my root of the drupal site]/profiles/mediamosa_profile/lua/lua_test', $exec_output, $ret_val);
print_r($exec_output);
echo $ret_val;

Run that under the browser (/luatest.php) and see what it tells you. I've remove the '2>&1' from the exec line; this part filters out the direct output of the 'exec' command, so i might tell you a bit more.

Also a script with phpinfo(); in the output it might also tell you a lot about the installation and what user it is using. To use phpinfo(); create a file under the root of the drupal site (e.g. phpinfo.php) and paste & save;

<?php
phpinfo();

Now call that script from the web browser (/phpinfo.php) and check the generated page. It should tell you somewhere what users it uses for running the PHP under your web server. Don't forget to remove this file later.

Hope this helps, let me know any progress, very curious about this.