The macOS system must ensure secure boot level set to full.

STIG ID: APPL-14-005100  |  SRG: SRG-OS-000445-GPOS-00199 |  Severity: medium |  CCI: CCI-002696,CCI-002699,CCI-002702 |  Vulnerability Id: V-259573

Vulnerability Discussion

The Secure Boot security setting must be set to full.

Full security is the default Secure Boot setting in macOS. During startup, when Secure Boot is set to
full security, the Mac will verify the integrity of the operating system before allowing the operating
system to boot.

Note: This will only return a proper result on T2 or Apple Silicon Macs.

Satisfies: SRG-OS-000445-GPOS-00199,SRG-OS-000446-GPOS-00200,SRG-OS-000447-GPOS-00201

Check

Verify the macOS system is configured to ensure secure boot level set to full using the
following command:

/usr/libexec/mdmclient QuerySecurityInfo | /usr/bin/grep -c "SecureBootLevel = full"

If the result is not "1", this is a finding.

Fix

Configure the macOS system to ensure secure boot level set to full by
booting into Recovery Mode and enable Full Secure Boot.
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