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Understanding Groups

You might have noticed that the Ownership & Permissions section of the Info panel enables you to specify permissions for the owner of the file, the group to which that user belongs, and others. But what is a group? Let's look at that concept briefly now.

In Mac OS X, users can be classified into many different groups so that they can access, or be excluded from accessing, certain information. There are many possible groups to choose from in the Owner and Group pop-up menus of the Ownership & Permissions section. Among them are the names for each of the user accounts on your computer, which are used to assign a file to those users. Other than those, the only groups you should be concerned with are admin and staff, which grant access to only administrative users and everyone with an account on the computer, respectively. (The other options are specialized groups that you won't need as an average user.)


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