I think one of the most overlooked, simple, items for anyone wanting to install OPNSense on their own hardware is the lack of reliable documentation on how to create a bootable USB drive. I tried with my favorite tool Rufus, but get errors about unknown image compression (both 22.1 and 22.7). Then I try Etcher, which seems to write the image, but the targeted computer, based on a SuperMicro board, is unable to boot from it.
The one line in the documents about using the windows tool physdiskwrite or whatever, is just odd. Never heard of that application and Windows will not find it among its utilities or cmd's. Ah, I now see its an app from M0n0wall. Any more random apps you want us to install?
No I do not use Linux, so forget about "dd".
Right now I am installing it via IPMI, which takes a VERY LONG TIME due to running in Console.
A way to create a USB drive is written at the PFSense docs, do you recommend those: https://docs.netgate.com/pfsense/en/latest/install/write-memstick.html , however, as mentioned, the "bootable" image do not seem to work.