An important preventive maintenance task is to protect your Mac from other people who use it or from those who access its files from a network. You can also use keychains to help you manage your own security information.
You should create user accounts for everyone who uses your Mac. In addition to the features that user accounts provide, such as a Web site and well-organized file storage, user accounts prevent unauthorized users from changing the system configuration of your machine.
→ To learn how to create and configure user accounts, see “Creating User Accounts,” p. 22.
For those who access your Mac over a network, you can control the access to specific ...