HOW TO CREATE ANOTHER USER ACCOUNT
When you set up the OS X (Mountain Lion) operating system for the first time, just before you get to the desktop screen, you are asked to give yourself a User Name. This is so that OS X (Mountain Lion) can create the master Administrator Account with your User Name on it. Once created, the master Administrator Account can never be deleted. It becomes a part of your OS X (Mountain Lion) and more importantly your User (OS X Membership) Account. As the administrator of OS X (Mountain Lion) you can create other User Accounts, for your Friends and Family for example, and be in full control of those user accounts.
Do not confuse the master Administrator Account with the Root User Account of OS X (Mountain Lion). The Root User Account (explained in a later section) is totally different and totally independant of your master Administrator Account.
When you first create a user account - Administrator User Account or Standard (Limited) User Account - a User Name folder is created for it along with a set of common sub-folders (i.e. Documents, Downloads, Music, Movies and Pictures) which can be used by OS X (Mountain Lion) and other, third-party, software to store their own sub-folders and files in. To use OS X (Mountain Lion) and any of the computer's installed hardware and software, including your user account's User Name folder and contents, you must be signed-in to OS X (Mountain Lion) with your user account's User Name & Password. Signing-in is done when OS X (Mountain Lion) first starts up - You click on your user name and enter its password, if you have created a password for it.
To create a User Account first open the SYSTEM PREFERENCES application, by either clicking on its docked icon (Fig 1.0) or by double clicking on its application icon within the APPLICATIONS folder (Fig 1.1). Doing so will display the available System Preferences (Control Panels) whereby you then need to click on the one called USERS & GROUPS (Fig 1.2).
After clicking on the System Preferences (Control Panel) called USERS & GROUPS the Users & Groups window will appear. In its bottom-left corner is a Padlock icon, which might be locked. If so, it means the security feature of OS X (Mountain Lion) is currently preventing you from making certain changes to the system preferences (settings), such as creating a new user account; hence why some buttons and options are faded/greyed out. So the next step is to make changes possible by making sure the locked Padlock icon is unlocked - Click on the locked Padlock icon to continue.
Clicking on the locked Padlock icon brings up (displays) the following security message requester that basically asks you to enter the password of the currently logged-in user account in order to grant it modification permissions (privileges) - The permission to create a new user account for example. Or put another way; You need to type the password of your currently logged-in user name (i.e. John Cairns) into the security requester's PASSWORD edit box in order to authorize the creation of a new user name (user account). When you have typed in the correct password click on the UNLOCK button to continue.
With the locked Padlock icon now unlocked the next thing to do is click on the PLUS (+) button just above it. Doing so will then bring up the New User Account window (Fig 1.6) which, by default (normal behaviour), thinks you want to create a limited Standard user account; In this example though I will show you how to create another Administrator user account so you have all the most important permissions (privileges) available for use with that account.
To create another Administrator user account, as opposed to a limited Standard user account, you need to click on the NEW ACCOUNT drop-down menu located at the top of the New User Account window and then select its ADMINISTRATOR option.
The next requirement of the New User Account window is your Full Name. This is the name that will appear on the log-on screen when you first start up your apple mac computer and also the name that will identify you, as a user, in certain applications you may install and/or register for example. Look at the full name as a Display Name. In this example I cannot use John Cairns as the full name because I have already used it as the full name for my main user account, therefore I will use Business User instead.
When you have typed your Full Name into the FULL NAME edit box the next step is to pick an Account Name (User Name) for the Administrator user account. As you click inside the ACCOUNT NAME edit box, or press the TAB keyboard key to get from the FULL NAME edit box to the ACCOUNT NAME edit box, the ACCOUNT NAME edit box is automatically filled in with your chosen Full Name minus spaces and converted to lowercase. So if I had typed John Cairns into the FULL NAME edit box the ACCOUNT NAME edit box would of automatically been filled in with johncairns (lowercase). As it stands now I have chosen Business User as my Full Name, which has resulted in the ACCOUNT NAME edit box automatically being filled in with businessuser (lowercase) and therefore given me the Account Name of businessuser (lowercase).
It is important to note at this point that your Account Name will be the name of the User Name folder placed on your hard drive. So with this in mind you might want to use a proper full name (i.e. John Smith) as your Full Name and a business name or nickname as your Account Name (User Name). In this example I have since changed the Account Name (User Name) to ClickWiseCS; taken after the name of my small business - Click Wise Computer Services.
The next three steps involve setting up an optional password for your new user account. If you do require a password, perhaps because you have certain people in your premises who cannot be trusted not to touch your expensive apple mac for whatever reason(s), you will need to type a new password into the PASSWORD edit box and then repeat it (retype it) inside the VERIFY edit box.
The second typing of the password, inside the VERIFY edit box, is needed so that OS X (Mountain Lion) can compare the two passwords and establish if you have made a typing error. For example. You may have thought you typed JIM as your password into the password edit box when in fact you typed JIN, because your finger caught the N key instead of the M key. So when you type JIM, correctly, into the verify edit box OS X (Mountain Lion) is able to see the mistake and inform you of it. If OS X (Mountain Lion) only asked you for one password and you typed JIN instead of JIM by mistake you would not be able to log-in to your new user account because you would not know the now correct password of JIN.
The last edit box is the PASSWORD HINT edit box. You can type an optional Password Hint into it that serves as a clue to what your password is, without actually revealing your password. This is good if you tend to forget passwords in general. In this example my password hint is Flower, to remind me that my password is the name of a flower, but there is nothing stopping you from deterring people further. For example, I could of put Animal as the password hint so that anyone trying to break into my user account would think my password is something to do with one of my household pets. In other words, the password hint doesn't have to relate directly to your actual password.
In order for the Password Hint to be available when logging into your user account (user name) you need to make sure the SHOW PASSWORD HINTS setting is ticked within the Login Options part of the USERS & GROUPS system preferences. Otherwise you will not see the Question Mark to the right of the PASSWORD edit box when trying to login.
When you have entered your password information click on the CREATE USER button to create the actual, new, user account. After clicking on the CREATE USER button you will be returned to the USERS & GROUPS window whereby your new user account will be listed as the selected user.
At this point you could use the new user account AS IS, without any iCloud and general Apple support, but because the whole experience of using one or more Apple devices is about using the Apple iCloud, iTunes and general Apple Support services I would highly recommend you click on the SET button now located on the USERS & GROUPS window (below) in order to setup the AppleID that will be associated with the newly created user account. Clicking on the SET button brings up a mini window (Fig 1.14 below) that allows you to either enter an existing AppleID for the new user account or create a new AppleID for it.
You normally create an AppleID when you first set up your Apple device - Macbook Pro laptop, iMac computer, iPhone mobile phone or iPod music device. That AppleID can then be used to authorize (register) up to five apple devices. So if you authorize your Macbook Pro laptop (as Authorized Device #1), and then your iPad (as Authorized Device #2) both of those devices will be able to view the same files from the cloud. So they will both be able to see the same documents in Pages, the same music files in iTunes and so on; simply because they are both linked to the same cloud (storage space). If both devices had separate AppleIDs they would only be able to view their own cloud's files. Here are the information pages about AppleID and iCloud from the Apple website.
You do not have to use an AppleID to use your new user account, but as said it doesn't make sense buying of an apple mac device if you are not going to utilize its 5GB FREE iCloud storage allowance, its integration of iTunes and general cloud features. Anyway, regardless if set up an AppleID now, later or never; you should now restart your computer so that you can then login and initialize your new user account's desktop and software for example.
After clicking on your new user account and entering its password you will then inherit certain applications and their settings from the main user account, which is quite normal. From there you can customize your new desktop, set up your iTunes application, e-mail application (e-mail accounts are not inherited), etc.