from Amazon, or check out the Advanced Account Options | October 31, 2007
You can access some hidden advanced account options for users (using an account with administrative privileges) by unlocking the the System Preference’s Accounts pane and then “right-clicking” on the user’s name to bring up the contextual menu with only one item: “Advanced Options…”. Many of the options in the resulting “Advanced Options” panel are ones that are best left untouched, but some of these things (Group ID, Login Shell and Aliases) can be particularly useful in some circumstances.
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