FileVault full-disk encryption uses XTS-AES-128 encryption with a 256-bit key to help prevent unauthorized access to the information on your startup disk.
1. Turn on FileVault
Navigate to the Apple Menu>System Preferences>Security&Privacy
Select the FileVault tab
Click on the lock icon in the bottom left corner of the window to make administrative changes
Select Turn on FileVault
2. You will need to select how you want to unlock the disk and reset your password (in case you forget)
You can elect to use your iCloud account to decrypt your disk and reset your password
You can elect to use a local recovery key to do the same
3. Encryption of your disk will run in the background, and only when your system is awake and powered on. You can check the progress of encryption in the Security & Privacy preferences. New files that are created during the process are automatically encrypted.
4. When FileVault encryption has completed, restart your system. When you boot back into your Mac, use your password to unlock the disk and finish the process.
5. Right click on the MetaAccess trayicon, click Rescan Security Issues to enforce the agent scans device compliance data and report to the MetaAccess servers again.
NOTE: While FileVault is enabled, no account is permitted to login automatically.
This article pertains to Mac OS