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 disable iCloud Private Relay.

Apple macOS 26 (Tahoe) Security Technical Implementation Guide

Assessment Title

Rule Text

The macOS system must disable iCloud Private Relay.

Description

Discussion Text

Enterprise networks may be required to audit all network traffic by policy; therefore, iCloud Private Relay must be disabled.

Network administrators can also prevent the use of this feature by blocking DNS resolution of mask.icloud.com and mask-h2.icloud.com.

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

Objective

V-277132

Rule

SV-277132r1148848_rule

Severity

medium

Rule Version

APPL-26-002170

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

Verify the macOS system is configured to disable the iCloud Private Relay with the following command:

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

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

Implementation Procedure

Fix Text

Configure the macOS system to disable the iCloud Private Relay by installing the "com.apple.applicationaccess" configuration profile.

STIG check 105 of 160 in the Apple macOS 26 (Tahoe) STIG checklist

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