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

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-268449APPL-15-000170SV-268449r1038944_ruleCCI-004923medium
Description
An approved time server must be the only server configured for use. As of macOS 10.13, only one time server is supported. 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
STIGDate
Apple macOS 15 (Sequoia) Security Technical Implementation Guide2026-02-06

Related Frameworks

1 mapping across 3 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

MON-07.1Synchronization With Authoritative Time Source
1.00
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (9) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-17(9)Disconnect or Disable Access
1.00
AU-8Time Stamps
1.00
AU-8(1)Synchronization with Authoritative Time Source
1.00
AU-8(2)Secondary Authoritative Time Source
1.00
CM-6Configuration Settings
1.00
IA-3(1)Cryptographic Bidirectional Authentication
1.00
SC-45System Time Synchronization
1.00
SC-45(1)Synchronization with Authoritative Time Source
1.00
SC-45(2)Secondary Authoritative Time Source
1.00
CCI1 mapping
CCI-004923
1.00

Details

Check Text (C-268449r1038944_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 that is synchronized with redundant USNO time servers as designated for the appropriate DOD network, this is a finding.

Fix Text (F-72380r1034286_fix)

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