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With OS X, multiple users can log onto the Mac, each keeping his or her own settings, files, documents, pictures, and most other things that make using the Mac unique Of course, managing a multi-user environment can certainly give you some headaches, especially until your feet are on solid ground with certain concepts So, let s get the main concept out of the way right now The Mac gives you two different kinds of user accounts: Administrator accounts and Normal accounts If you installed OS X (or purchased a new Mac with it pre-installed), you entered your name and a password OS X saw you as the first user and assigned your account as an Administrator account An Administrator account is just as it sounds the Administrator is the one in charge of the Mac So, what can the Administrator do Just about anything The Administrator can create and delete user accounts The Administrator can create another Administrator account The Administrator can install new programs in the Applications folder
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Mac OS X Headaches: How to Fix Common (and Not So Common) Problems in a Hurry
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The Administrator can make changes to all System Preferences options The Administrator can use the Disk Utility programs and NetInfo Manager The Administrator can create new folders outside of the Administrator s folder (also called the Home folder) The Administrator can install fonts to the Library folder As you can see, the Administrator has the power to administer, or manage, the Mac So what about the second account The second kind of account is called a Normal account The Normal account is designed for everyone who is not an Administrator The Normal account gives a user power over his or her home folder, but not much else The Normal user can change a few System Preferences options (such as the Desktop, Screen Effect, and so on), but outside of this, the Normal user cannot make changes that affect the whole system In fact, the Normal user cannot even create folders outside of his or her home folder So, is the Normal account too restrictive Not at all a typical user can do everything he or she needs to do, without making systemwide changes This protects the Mac from the hands of those who should not be making changes and keeps you in control You might be wondering who is an Administrator on your computer That s no problem; just open System Preferences and, in the System category, click Accounts You see a list of accounts The accounts that are Administrator accounts have the word Admin listed in the Type column, as shown in the following illustration All Normal accounts have nothing listed in the Type column
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CHAPTER 3: User Headaches
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Understanding the Root Account
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I said that Mac supports two kinds of accounts: Administrator and Normal accounts That is not entirely true There is a third account, hidden way down in OS X called the root account Way down under the nice graphical interface of OS X is the UNIX operating system UNIX has been around forever, practically, and OS X runs on top of UNIX, giving you a rock-solid stable operating system Within this UNIX system is the root account, which is also called the superuser account Basically, the root account can do anything and everything, which includes deleting and fiddling with OS X operating system files It is designed for programmers and those deep in the trenches of OS X, not the rest of us who want to use and enjoy the Mac So, should you use the root account Around 999 percent of the time, the answer is a resounding no Watch out and keep out should be your motto However, in the interest of providing information, I ll show you how to log in to it But beware, you can greatly damage your Mac using the root account (and even completely wreck OS X so that you have to reinstall), so exercise extreme caution if you want to use this account
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1 Log on to OS X with an Administrator account 2 Open the Applications folder and then the Utilities folder 3 Open the NetInfo Manager Click the lock and enter your Administrator
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