← Back to Apple macOS 14 (Sonoma) Security Technical Implementation Guide

V-259450

CAT II (Medium)

The macOS system must be configured to use an authorized time server.

Rule ID

SV-259450r1038944_rule

STIG

Apple macOS 14 (Sonoma) Security Technical Implementation Guide

Version

V2R3

CCIs

CCI-004923

Discussion

Approved time servers must be the only servers configured for use. This rule ensures the uniformity of time stamps for information systems with multiple system clocks and systems connected over a network. An authoritative time server is synchronized with redundant United States Naval Observatory (USNO) time servers as designated for the appropriate DOD network. Satisfies: SRG-OS-000355-GPOS-00143,SRG-OS-000356-GPOS-00144

Check Content

Verify the macOS system is configured to use an authorized time server with the following command:

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

If the result is not an authoritative time server which is synchronized with redundant USNO time servers as designated for the appropriate DOD network, this is a finding.

Fix Text

Configure the macOS system to use an authorized time server by installing the "com.apple.MCX" configuration profile.