I have used the Aobo Mac keylogger on my Mac to monitor the websites that visited by my children,It helps me a lot.You can learn more about it here
http://www.keylogger-mac.com
http://www.parental-controls-software.net
http://www.keylogger4u.com
Hope this could help you.
sorry for my reply to such an old topic. I am new here. Can I get the Aobo mac keylogger for free. I need one but I don't want to pay for this as it is really a bit expensive for me.