macOS 26 - Tahoe
The macOS system must enforce time synchronization
STIG ID: APPL-26-000014 | SRG: SRG-OS-000355-GPOS-00143 | Severity: Medium | CCI: CCI-004923 | Vulnerability ID: V-277035
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
Check
C-81190r1148555_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
F-81095r1148556_fix
Configure the macOS system to enforce time synchronization by installing the "com.apple.ManagedClient.preferences" configuration profile.