The macOS system must enforce auto logout after 86400 seconds of inactivity.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-259449	SRG-OS-000279-GPOS-00109	APPL-14-000160	SV-259449r958636_rule	2024-12-04	2

Description
Auto logout must be configured to automatically terminate a user session and log out the after 86400 seconds of inactivity. Note: The maximum that macOS can be configured for autologoff is 86400 seconds. [IMPORTANT] ==== The automatic logout may cause disruptions to an organization's workflow and/or loss of data. Information system security officers (ISSOs) are advised to first fully weigh the potential risks posed to their organization before opting to disable the automatic logout setting. ====

Description

Auto logout must be configured to automatically terminate a user session and log out the after 86400 seconds of inactivity. Note: The maximum that macOS can be configured for autologoff is 86400 seconds. [IMPORTANT] ==== The automatic logout may cause disruptions to an organization's workflow and/or loss of data. Information system security officers (ISSOs) are advised to first fully weigh the potential risks posed to their organization before opting to disable the automatic logout setting. ====

ℹ️ Check
Verify the macOS system is configured to enforce auto logout after 86400 seconds of inactivity with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('.GlobalPreferences')\ .objectForKey('com.apple.autologout.AutoLogOutDelay').js EOS If the result is not "86400", this is a finding.

✔️ Fix
Configure the macOS system to enforce auto logout after 86400 seconds of inactivity by installing the "com.apple.GlobalPreferences" configuration profile.