Howtogeek shows you how to encrypt your Macs system drive

Macs offer excellent built-in encryption support, whether you want to encrypt your entire hard drive, removable drives, or just create an encrypted container for only your most important files. Its all built in. These features are hard to come by on Windows without third-party software, with BitLocker only available on Professional versions of Windows and BitLocker To Go only available on Enterprise editions. Windows 8.1 is now encrypting system drives by default, but only on new PCs. Encrypt Your System Drive The FileVault feature allows you to encrypt your Macs entire hard disk. When you enable File Vault, your files are stored on disk in an encrypted, seemingly scrambled format. Someone who gains access to your Mac, removes your hard drive, and attempts to view your files wont be able to do it without your encryption key.

  How to Encrypt Your Macs System Drive, Removable Devices, and Individual Files