@olivierlambert Looks possible, since I've clicked forget this particular slave/host in XOA, how would I go around adding it back there? The slave is missing from the masters pool list.

@MrXeon So, the actual root issue here I believe, is opnsense installs come with an IP and dhcp server already assigned and enabled on the lan interface (I believe it's 192.168.1.1, but don't quote me). If your existing home network already uses 192.168.1.x/24 and already has a dhcp server, booting an opnsense install with it's virtual lan nic set to your existing home lan, there will be a lot of conflicts. Virtual nic order can be whatever you'd like (you can change and move around assignments in opnsense), but if it's preconfigured lan interface gets set to your preexisting lan network, there will be conflicts

@Andrew I’ve started to experiment with Duet + OpenCore chain loading but I'm getting the same results… I’ve tested it now on two different Legacy Machines, so either I’m setting it up wrong or Duet is the issue all around the baord… why could Duet potentially not be happy? It’s not my target system, it’s gotta be something to do with the file structure or the DuetPkg itself, I've also checked for Debug Logs from OpenCore, seems it ain't booting at all, so it's definitely an issue early on.

Please print the output of xl info and xl dmesg