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APPL-26-005100 The macOS system must ensure Secure Boot level is set to "full".

DISA STIG library V1R4
All changes in this version
first version loaded CAT II

Maps to SI-6 via CCI-002696, CCI-002699, CCI-002702

Title

The macOS system must ensure Secure Boot level is set to "full".

Control

Verify the macOS system is configured to ensure Secure Boot level is set to "full" using the following command: /usr/libexec/mdmclient QuerySecurityInfo 2>/dev/null | /usr/bin/grep -c "SecureBootLevel = full" If the result is not "1", this is a finding.

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 a T2 or Apple Silicon Macs. Satisfies: SRG-OS-000445-GPOS-00199, SRG-OS-000446-GPOS-00200, SRG-OS-000447-GPOS-00201

Related controls

CCI-002696, CCI-002699, CCI-002702

Fix

Configure the macOS system to ensure Secure Boot level is set to "full" by booting into Recovery Mode and enabling Full Secure Boot.