I installed mampp to my macbook. I put the mysql database in db folder, I do the same with my php files in htdocs. But I cannot see anything in my browser when I hit http://localhost/ http://localhost:8888/ for mamp. Blank page! No error message displayed. Of course there are log files but it seems to be a stupid problem. Is there any other mysql service running from mac os? What do I have to do? I tested xampp also and the results were the same. I can now see a terminal window in my dock: chown: /Applications/MAMP/logs/mysql_error_log: Operation not permitted A mysqld process already exists Is this the problem? What do I have to do?