Mac OS X is designed to be a multiple-user system. This means that different individuals can log in and use a Mac OS X computer.
Each user can install his own applications, configure his own desktop, and save his own documents. User files and setup is kept private. When each user logs in to the computer with his account, he can access only the files that belong to him or are shared.
Mac OS X 10.5 makes it easy to set up a guest account for friends and family members you may want to allow temporary access to your computer. It also enhances parental controls, which help protect young computer users from certain content while protecting your computer from being accidentally reconfigured by a novice user.
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