Apple macOS 15 (Sequoia) Security Technical Implementation Guide

The Apple macOS 15 (Sequoia) Security Technical Implementation Guide (V1 R8) has 160 STIG checks. New to STIG checklists? Read What is a STIG checklist?, CKL vs CKLB, and STIG vs SCAP benchmark.

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Severity

Version

V1 · R8

CurrentPublished Wed Sep 30 2026

The macOS system must disable the guest account.

Apple macOS 15 (Sequoia) Security Technical Implementation Guide

Assessment Title

Rule Text

The macOS system must disable the guest account.

Description

Discussion Text

Guest access must be disabled.

Turning off guest access prevents anonymous users from accessing files.

New to STIG checklists? Read What is a STIG checklist? and CKL vs CKLB.

Objective

V-268510

Rule

SV-268510r1131221_rule

Severity

medium

Rule Version

APPL-15-002063

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

Verify the macOS system is configured to disable the guest account with the following command:

/usr/bin/osascript -l JavaScript << EOS
function run() {
let pref1 = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.MCX')\
.objectForKey('DisableGuestAccount'))
let pref2 = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.MCX')\
.objectForKey('EnableGuestAccount'))
if ( pref1 == true && pref2 == false ) {
return("true")
} else {
return("false")
}
}
EOS

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

Implementation Procedure

Fix Text

Configure the macOS system to disable the guest account by installing the "com.apple.MCX" configuration profile.

STIG check 88 of 160 in the Apple macOS 15 (Sequoia) STIG checklist

← Previous · V-268509The macOS system must disable Bluetooth when no approved device is connected.Next · V-268511 →The macOS system must enable gatekeeper.