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APPL-26-000070 The macOS system must enforce screen saver timeout.

DISA STIG library V1R4
All changes in this version
first version loaded CAT II

Maps to AC-11 via CCI-000057

Title

The macOS system must enforce screen saver timeout.

Control

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.

Discussion

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.

Related controls

CCI-000057

Fix

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