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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-259450	APPL-14-000170	SV-259450r940972_rule		Medium

Description

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

STIG	Date
Apple macOS 14 (Sonoma) Security Technical Implementation Guide	2024-01-10

Details

Check Text ( C-63189r940970_chk )

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 United States Naval Observatory (USNO) time servers as designated for the appropriate DoD network, this is a finding.

Fix Text (F-63097r940971_fix)
Configure the macOS system to use an authorized time server by installing the "com.apple.MCX" configuration profile.