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Lesson 6. Personalize Your Mac to Meet Y... > Higher-level security features

Higher-level security features

  • Secure Empty Trash: You might think that after you empty the Trash, it's gone. But it's possible to recover many deleted files using special data-recovery software. If you are selling or giving away your Mac, you might want to make sure no one can recover your old, trashed files. To completely overwrite files so no one can ever get to them, go to the Finder menu and choose Secure Empty Trash. This might take several minutes, depending on how much stuff you've thrown away since you got the computer!

  • Encrypt a disk image: Using the Disk Utility (found in the Utilities folder, which is in the Applications folder), you can protect all or part of your hard disk by making a selected portion of it into a “disk image,” which looks like a hard disk icon. It has its own password; if your Keychain is locked (see pages 160161), this image is really safe from prying eyes and fingers because someone would need both passwords to access the disk. When unlocked, this disk image acts just like any other hard disk and you can move files in it, copy files to it, and delete files from it. I recommend you read all about this feature in the Disk Utility Help files before you start using it.


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