The macOS system must disable the guest account.

Guest access must be disabled.

Turning off guest access prevents anonymous users from accessing files.

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.

Configure the macOS system to disable the guest account by installing the "com.apple.MCX" configuration profile.