The macOS system must disable Bonjour multicast.

STIG ID: APPL-14-002005 |  SRG: SRG-OS-000095-GPOS-00049 |  Severity: medium |  CCI:  | Vulnerability Id: V-259481

Vulnerability Discussion

Bonjour multicast advertising must be disabled to prevent the system from broadcasting its presence and available services over network interfaces.

Check

Configure the macOS system to disable Bonjour multicast by installing the "com.apple.mDNSResponder" configuration profile.

Fix

Verify the macOS system is configured to disable Bonjour multicast with the following command:

/usr/bin/osascript -l JavaScript << EOS
$.NSUserDefaults.alloc.initWithSuiteName('com.apple.mDNSResponder')\
.objectForKey('NoMulticastAdvertisements').js
EOS

If the result is not "true", this is a finding.