Is there a BOOTP query tool that exists for macOS? I would like to query a BOOTP server as a specific MAC address to test the response. What tools exists for macOS?
Something like this? https://www.weird-solutions.com/enterprise-solutions/bootp-turbo
If you just want to see if a BOOTP machine responds to a particular MAC address, just use a virtuall machine with a manually configured MAC address

In VirtualBox: