The macOS system must enforce time synchronization.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-277035 | APPL-26-000014 | SV-277035r1148557_rule | CCI-004923 | medium |
| Description | ||||
| 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 | ||||
| STIG | Date | |||
| Apple macOS 26 (Tahoe) Security Technical Implementation Guide | 2026-02-11 | |||
Details
Check Text (C-277035r1148557_chk)
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.
Fix Text (F-81095r1148556_fix)
Configure the macOS system to enforce time synchronization by installing the "com.apple.ManagedClient.preferences" configuration profile.