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OS X Yosemite: About FileVault encryption

To ensure security when you turn on FileVault, other security features are also turned on. For example, when you turn on FileVault, you need a password to log in when your Mac is in sleep, or after leaving the screen saver. After the initial startup, only users enabled in FileVault can log in; other users need an administrator to log in first. For more information, see Encrypt the contents of your Mac with FileVault.

Last Modified: Mar 5, 2015
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