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V-277035

CAT II (Medium)

The macOS system must enforce time synchronization.

Rule ID

SV-277035r1148557_rule

STIG

Apple macOS 26 (Tahoe) Security Technical Implementation Guide

Version

V1R2

CCIs

CCI-004923 CCI-004926 CCI-004922

Discussion

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

Check Content

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

Configure the macOS system to enforce time synchronization by installing the "com.apple.ManagedClient.preferences" configuration profile.