I was able to get it working on my mac with this patch,

➜  openfact git:(interfaces-ifconfig) ✗ git --no-pager diff
diff --git a/spec/facter/resolvers/networking_spec.rb b/spec/facter/resolvers/networking_spec.rb
index 1b6a6cbfa..ce702627c 100644
--- a/spec/facter/resolvers/networking_spec.rb
+++ b/spec/facter/resolvers/networking_spec.rb
@@ -18,6 +18,8 @@ describe Facter::Resolvers::Networking do
         .to receive(:execute).with('ipconfig getoption llw0 server_identifier', logger: an_instance_of(Facter::Log)).and_return('')
       allow(Facter::Core::Execution)
         .to receive(:execute).with('ipconfig getoption awdl0 server_identifier', logger: an_instance_of(Facter::Log)).and_return(dhcp)
+      allow(Facter::Core::Execution)
+        .to receive(:execute).with('ipconfig getoption pair2 server_identifier', logger: an_instance_of(Facter::Log)).and_return('')
     end

     after do

openfact git:(interfaces-ifconfig) ✗ bundle exec rake spec
/Users/michaelharp/.rbenv/versions/3.2.8/bin/ruby -I/Users/michaelharp/.rbenv/versions/3.2.8/lib/ruby/gems/3.2.0/gems/rspec-core-3.13.6/lib:/Users/michaelharp/.rbenv/versions/3.2.8/lib/ruby/gems/3.2.0/gems/rspec-support-3.13.6/lib /Users/michaelharp/.rbenv/versions/3.2.8/lib/ruby/gems/3.2.0/gems/rspec-core-3.13.6/exe/rspec --pattern spec/\*\*\{,/\*/\*\*\}/\*_spec.rb
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