I have already posted that Apple laptops can be easily hacked. Now, with the new version of Apple’s OS X, you thought that security will be improved but this is not the case. OS X Lions passwords can be hacked faster and easier than ever. You don’t even have to crack the passwords, you can just change them to whatever you want if you have physical access to the terminal. By cracking the password, we mean to find the password from its hash or with a brute force attack. If you have access to a computer, you can change the password with the following command “$ dscl localhost -passwd /Search/Users/bob” (if the logged in user is bob). After running this you will be prompted to change the password. For more details on how to crack Mac OS X (Lion) passwords visit the source.
Source: [DefenseInDeapth]