FileVault requires that you log in every time your Mac starts up, and no account is permitted to log in automatically.
Encrypt Your Entire System Drive
You can then turn it on again to generate a new key and disable all older keys. Decryption occurs in the background as you use your Mac, and only while your Mac is awake and plugged in to AC power.
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Click the FileVault tab. Click Turn On FileVault. Choose answers that you're sure to remember.
How to Encrypt Your Hard Drive
Keep the letters and numbers of the key somewhere safe—other than on your encrypted startup disk. Click Turn Off FileVault. If you have an existing backup drive, skip to the next section. If you have an existing unencrypted drive that you want to convert to being encrypted, follow these steps first:.
- Turn on and set up FileVault.
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If your Mac complains and says that it cannot encrypt the drive, then you will need to use Disk Utility to erase the drive first, and then start from the beginning. That is why we are here, to help you with every step of this if you want.
Reset your password or change your FileVault recovery key
Contact us and we will get it done for you! Want to remove your private info from the web? Make it work. Several shortcomings were identified in Legacy FileVault. Another issue is storage of keys in the macOS "safe sleep" mode. The study authors were able to use a cold boot attack to recover cryptographic keys for several popular disk encryption systems, including FileVault, by taking advantage of redundancy in the way keys are stored after they have been expanded for efficient use, such as in key scheduling.
The authors recommend that computers be powered down, rather than be left in a "sleep" state, when not in physical control by the owner.
Verify that your computer's whole-disk encryption is enabled
Early versions of FileVault automatically stored the user's passphrase in the system keychain, requiring the user to notice and manually disable this security hole. A free space wipe using Disk Utility left a large portion of previously deleted file remnants intact.
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Similarly, FileVault compact operations only wiped small parts of previously deleted data. FileVault uses the user's login password as the encryption pass phrase. Once unlocked, other users may also use the computer until it is shut down. When FileVault 2 is enabled while the system is running, the system creates and displays a recovery key for the computer, and optionally offers the user to store the key with Apple. During a cryptanalysis in , this mechanism was found safe. Changing the recovery key is not possible without re-encrypting the File Vault volume.
The key must be in form xxxx-xxxx-xxxx-xxxx-xxxx-xxxx and will return true if correct. If a volume to be used for startup is erased and encrypted before clean installation of OS X From Wikipedia, the free encyclopedia. Apple Press Info. June 23,