The macOS system must enforce screen saver timeout.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-268441	SRG-OS-000029-GPOS-00010	APPL-15-000070	SV-268441r1034263_rule	2025-02-20	1

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.

ℹ️ Check
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 << EOS function run() { let timeout = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.screensaver')\ .objectForKey('idleTime')) if ( timeout <= 900 ) { return("true") } else { return("false") } } EOS If the result is not "true", this is a finding.

ℹ️ Check

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 << EOS function run() { let timeout = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.screensaver')\ .objectForKey('idleTime')) if ( timeout <= 900 ) { return("true") } else { return("false") } } EOS If the result is not "true", this is a finding.

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