The macOS system must prevent AdminHostInfo from being available at LoginWindow.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-277033	SRG-OS-000031-GPOS-00012	APPL-26-000009	SV-277033r1149397_rule	2025-10-01	1

Description
The system must be configured to not display sensitive information at the LoginWindow. If the key "AdminHostInfo" is configured with a string value, it will allow the HostName, IP Address, and operating system version and build to be displayed when clicking on the clock area of the login window. Configuring this key to be an integer value, since it expects a string value, will effectively disable the behavior. Note: This configuration requires it to be deployed via Managed Preferences rather than directly to com.apple.loginwindow.

Description

The system must be configured to not display sensitive information at the LoginWindow. If the key "AdminHostInfo" is configured with a string value, it will allow the HostName, IP Address, and operating system version and build to be displayed when clicking on the clock area of the login window. Configuring this key to be an integer value, since it expects a string value, will effectively disable the behavior. Note: This configuration requires it to be deployed via Managed Preferences rather than directly to com.apple.loginwindow.

ℹ️ Check
Verify the macOS system is configured to prevent AdminHostInfo from being available at LoginWindow with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.loginwindow')\ .integerForKey('AdminHostInfo') EOS If the result is not "-1", this is a finding.

✔️ Fix
Configure the macOS system to prevent AdminHostInfo from being available at LoginWindow by installing the "com.apple.ManagedClient.preferences" configuration profile.