The macOS system must disable the guest account.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-277119 | APPL-26-002063 | SV-277119r1148809_rule | CCI-001813 | medium |
| Description | ||||
| Guest access must be disabled. Turning off guest access prevents anonymous users from accessing files. | ||||
| STIG | Date | |||
| Apple macOS 26 (Tahoe) Security Technical Implementation Guide | 2026-02-11 | |||
Details
Check Text (C-277119r1148809_chk)
Verify the macOS system is configured to disable the guest account with the following command:
/usr/bin/osascript -l JavaScript << EOS
function run() {
let pref1 = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.MCX')\
.objectForKey('DisableGuestAccount'))
let pref2 = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.MCX')\
.objectForKey('EnableGuestAccount'))
if ( pref1 == true && pref2 == false ) {
return("true")
} else {
return("false")
}
}
EOS
If the result is not "true", this is a finding.
Fix Text (F-81179r1148808_fix)
Configure the macOS system to disable the guest account by installing the "com.apple.MCX" configuration profile.