Apple macOS 26 (Tahoe) Security Technical Implementation Guide

The Apple macOS 26 (Tahoe) Security Technical Implementation Guide (V1 R4) 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 · R4

CurrentPublished Wed Sep 30 2026

The macOS system must enforce time synchronization.

Apple macOS 26 (Tahoe) Security Technical Implementation Guide

Assessment Title

Rule Text

The macOS system must enforce time synchronization.

Description

Discussion Text

Time synchronization must be enforced on all networked systems.

This rule ensures the uniformity of time stamps for information systems with multiple system clocks and systems connected over a network.

Satisfies: SRG-OS-000355-GPOS-00143, SRG-OS-000356-GPOS-00144, SRG-OS-000785-GPOS-00250

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

Objective

V-277035

Rule

SV-277035r1148557_rule

Severity

medium

Rule Version

APPL-26-000014

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

Verify the macOS system is configured to enforce time synchronization with the following command:

/usr/bin/osascript -l JavaScript << EOS
$.NSUserDefaults.alloc.initWithSuiteName('com.apple.timed')\
.objectForKey('TMAutomaticTimeOnlyEnabled').js
EOS

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

Implementation Procedure

Fix Text

Configure the macOS system to enforce time synchronization by installing the "com.apple.ManagedClient.preferences" configuration profile.

STIG check 8 of 160 in the Apple macOS 26 (Tahoe) STIG checklist

← Previous · V-277034The macOS system must automatically remove or disable temporary or emergency user accounts within 72 hours.Next · V-277036 →The macOS system must limit consecutive failed login attempts to three.