I recently installed a version of EE on my local machine(Mamp Pro), v2.5.5 - Build Date: 20121220. I set this site up as per usual and started building my initial site templates etc ready for the master site which would encompass all the other child sites with MSM.
I then installed MSM by buying the software license and then enabling it in the main general settings of the cp in my site. I then created a new sub domain with MAMP PRO and then added a folder in it with index.php and admin.php, I then changed these settings in each:
index.php
$system_path = '../build/system/';
$assign_to_config['site_name'] = 'mysitename';
$assign_to_config['cp_url'] = 'http://missns:8888/admin.php';
$assign_to_config['site_url'] = 'http://missns:8888';
admin.php
$system_path = '../build/system/';
$assign_to_config['site_name'] = 'mysitename';
$assign_to_config['cp_url'] = 'http://missns:8888/admin.php';
When I try to access
http://missns:8888/admin.php or http://missns:8888
I get this error:
Site Error: Unable to Load Site Preferences; No Preferences Found for: mysite
Then in my main cp site theme where my main site is installed I go to the top right of the site and click my master site name and click 'edit sites', I then just get a server error page that takes me out of my site, it basically blows up.