macOS 15 - Sequoia

The macOS system must enforce screen saver timeout

STIG ID: APPL-15-000070 | SRG: SRG-OS-000029-GPOS-00010 | Severity: Medium | CCI: CCI-000057 | Vulnerability ID: V-268441

Description

The screen saver timeout must be set to 900 seconds or a shorter length of time.This rule ensures that a full session lock is triggered within no more than 900 seconds of inactivity.

Check

C-268441r1034263_chk

Verify the macOS system is configured to initiate the screen saver timeout after 15 minutes of inactivity with the following command:/usr/bin/osascript -l JavaScript << EOSfunction run() {let timeout = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.screensaver')\.objectForKey('idleTime'))if ( timeout <= 900 ) {return("true")} else {return("false")}}EOSIf the result is not "true", this is a finding.

Fix

F-72372r1034262_fix

Configure the macOS system to initiate the screen saver after 15 minutes of inactivity by installing the "com.apple.screensaver" configuration profile.