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You can protect your stored data by locking files against accidental deletion, by encrypting your Home folder using FileVault, by choosing tight security settings in System Preferences, and by locking your Mac with a firmware password
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Mac OSPCLeopard QuickSteps Controlling Security X QuickSteps Getting to Know Your PC
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SHARING FILES AND FOLDERS WITH OTHER LOCAL USERS
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Mac OS X provides two easy ways to share files and folders with other users of your Mac:
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To protect a file or folder against being accidentally deleted, you can lock it To do so:
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Place the files and folders in your ~/Public folder,
the Public folder inside your Home folder (To display your Home folder, activate the Finder, open the Go menu, and click Home) Others can then view the files and folders but not change
1 2 3 4 5
Activate the Finder and navigate to the folder or file Click the folder or file to select it Open the File menu and click Get Info The Info window for the folder or file is displayed Select the Locked check box Click the Close button (the red button) to close the Info window
them
Place the files and folders in the /Users/Shared/ folder, which all users can access and change Similarly, you can access and change the files that
other users have placed in this folder ACCESSING THE SHARED FOLDER To access the /Users/Shared/ folder:
When you ve locked a folder or file, Mac OS X displays a lock icon at the lower-left corner of its icon If you try to delete a locked folder or file, Mac OS X displays an error dialog box (as shown below) Click Stop if you want to keep the item; click Continue if you want to delete it
1 Click the Finder icon on the Dock A Finder
window will be displayed
2 Click Macintosh HD in the Sidebar The contents
of your Mac s hard disk will be displayed
3 Open the Users item by clicking it or double-
clicking it (depending on the Finder view you re using) The contents of the Users folder will be displayed
Encrypt Your Home Folder with FileVault
When security is vital, you can use the FileVault feature to automatically encrypt all the objects stored in your Home folder using a security protocol that s extremely hard to crack
DECIDE WHETHER TO USE FILEVAULT
4 Open the Shared item by clicking it or double-
clicking it GAINING EASY ACCESS TO THE SHARED FOLDER To provide easy access to the /Users/Shared/ folder via the Finder, drag the Shared folder to the Sidebar to
FileVault is turned off by default because, while it s extremely secure, if you forget your password, you can lose access to your own files permanently Before turning on FileVault, evaluate whether you really need it If your Mac
create an entry for it there Continued
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MacQuickSteps Controlling PC OS X Leopard QuickStepsKnow Your PC Security Getting to
UICKSTEPS
SHARING FILES AND FOLDERS WITH OTHER LOCAL USERS (Continued)
SETTING PERMISSIONS ON FILES AND FOLDERS Instead of placing files in the /Users/Shared/ folder, you can also share items by placing them in folders on which you set permissions that allow other users the required level of access For details on changing permissions on a file or folder, see Change an Object s Permissions and Ownership in 3
contains secret or sensitive information, and if the risk of losing your Mac is even moderately high (for example, because you have a laptop Mac), consider FileVault If your Mac contains only mundane information, FileVault probably isn t worth the effort Apart from the potential for losing your files, FileVault s other main disadvantage is that it slows down your Mac a little If your Mac is slow anyway, you may find FileVault s added burden a problem If your Mac normally runs quickly, you may not notice the difference FileVault also prevents you from recovering individual files and folders using Time Machine Instead, you can restore your entire system if necessary This limitation too may deter you from using FileVault When you log in, FileVault decrypts your folders and files so that you can use them When you log out (or shut down your Mac), FileVault encrypts the folders and files again This means that FileVault ensures that your folders and files are secure only when you re logged out If you leave your Mac running without logging out, anyone can access your folders and files, because they have been decrypted using your credentials
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