2.6.1.3 Ensure all user storage CoreStorage volumes are encrypted
Information
Apple introduced Core Storage with 10.7. It is used as the default for formatting on macOS volumes prior to 10.13. All HFS and Core Storage Volumes should be encrypted Rationale: In order to protect user data from loss or tampering volumes carrying data should be encrypted
Solution
Use Disk Utility to erase a disk and format as macOS Extended (Journaled, Encrypted)