The macOS system must be configured with dedicated user accounts to decrypt the hard disk upon startup.
An XCCDF Rule
Description
When "FileVault" and Multifactor Authentication are configured on the operating system, a dedicated user must be configured to ensure that the implemented Multifactor Authentication rules are enforced. If a dedicated user is not configured to decrypt the hard disk upon startup, the system will allow a user to bypass Multifactor Authentication rules during initial startup and first login.
- ID
- SV-257160r905113_rule
- Version
- APPL-13-000032
- Severity
- Medium
- References
- Updated
Remediation Templates
A Manual Procedure
Configure the macOS system with a dedicated user account to decrypt the hard disk at startup and disable the logon ability of the newly created user account with the following commands:
/usr/bin/sudo /usr/bin/fdesetup add -user <username>
/usr/bin/sudo /usr/bin/dscl . change /Users/<FileVault_User> UserShell </path/to/current/shell> /usr/bin/false