Hello, In mac os x 10.7.3, there is a log file created in which all the user entered log in details and passwords which were used on the computer are saved. This leading to the security issues as am connected in a lan network. After many searches, came to know that activating the file vault on my machine will provide security on mac. So tell me how do I do that, and if not filevault what else will help me. Thank you.