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Q&A

Q1: Why would you have your system clock set by a network time server?
A1: Network time servers are useful if you don’t want to worry about setting the correct time on a computer that’s connected to the Internet every time it’s in use. However, if you choose this option, your computer might take longer to start up if it can’t find the network time server.
Q2: When I open some of the System Preferences panels, all the options are grayed out. Why?
A2: Some panels—those with a lock button at the bottom—can be changed only by a user with administrator privileges. These tend to be preferences that affect the operation of the entire system (including Energy Saver, Network, and Accounts). To change them, you must click the lock button and enter the username and password of an administrator.


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