... 12.1. Introducing Accounts The concept of user accounts is central to Mac OS X's security approach. Like the Unix under ... don't share your Mac with anyone and don't create any other accounts, you might still be tempted to learn about the accounts feature because of its ability to password-protect the entire ... automatically turns on something called automatic login (Section 12.5). You will be using one of these accounts, though, whether you realize it or not. Furthermore, when you're stuck in line at...