The macOS system must disable Bonjour multicast.

Severity
Group ID
Group Title
Version
Rule ID
Date
STIG Version
mediumV-259481SRG-OS-000095-GPOS-00049APPL-14-002005SV-259481r958478_rule2024-12-042
Description
Bonjour multicast advertising must be disabled to prevent the system from broadcasting its presence and available services over network interfaces.
ℹ️ Check
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.
✔️ Fix
Configure the macOS system to disable Bonjour multicast by installing the "com.apple.mDNSResponder" configuration profile.