I'm trying to move my Magento development to MAMP and getting problem with 100% usage on httpd both for new installations (after Create Admin Account) page and for existing stores moved from test server. I'm using MAMP Pro 2.0.1 with PHP 5.3.6
Also I've changed following settings and enabled xdebug: max_execution_time = 1800 memory_limit = 128M
If anyone faced similar problem or have any suggestion please share