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To turn on FileVault

1.
Before you begin, make sure you have the Admin name and password, as well as the password for this user (if it's separate from the Admin user).

2.
Also before you begin, make sure all other users are logged out.

3.
Check to make sure you have enough hard disk space available for the process—you'll need as much free hard disk space as there is data in your Home folder.

To check the file size of your Home folder, single-click the Home icon in the Sidebar of any Finder window.

Press Command Option I to display the Get Info window.

Check the “Size” of the Home folder.

Now check to see how much free hard disk space you have: Single-click the hard disk icon in the Sidebar. In the Get Info window (which has now switched to show you the info for the hard disk), find the amount “Available.” About 1024 megabytes fit into one gigabyte, so unless you've been making movies on your Mac, you probably have plenty of space.

4.
You must first set a Master password. Keep in mind that once you set a Master password, you can never get rid of it. If you forget your login password and you also forget the Master password, everything in your Home folder is lost forever.


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