nmrpflash seems to fail when assigning mac address or ip in OS X 12.2 (21D49)

[tnine]

Hello!
Unfortunately I have 2 bricked RBS850 Satellites. I'm attempting to use nmrpflash as described in the readme, and I experience the following error.

➜  Downloads sudo ./nmrpflash -vvv -i en5 -f ~/Downloads/RBS850-V4.6.3.16/RBS850-V4.6.3.16-signed.chk
Waiting for Ethernet connection.
Adding 10.164.183.253 to interface en5.
ioctl(SIOCAIFADDR: Device not configured

I am attempting to flash my RBS from a MacBook Pro (16-inch, 2019), with a USB C attached 1G ethernet port. Please let me know any additional information I can provide. I'm a software engineer, and while this is not my area of expertise, I'm happy to contribute what I can to help in the diagnosis of the issue.

While not the same issue at on the surface, it seems there is some issue with mac address spoofing in OS X on 12.2. https://developer.apple.com/forums/thread/684745

Note that after this error, my interface no longer appears in the list. Unplugging and re-plugging the device re-activates the network interface.

Before Error:

en0              10.10.0.27       88:66:5a:27:9a:f0
awdl0            0.0.0.0          26:3d:9b:0f:4f:96
llw0             0.0.0.0          26:3d:9b:0f:4f:96
en5              0.0.0.0          00:e0:4c:ac:f4:5f
bridge0          0.0.0.0          82:20:dd:62:54:01
en1              0.0.0.0          82:20:dd:62:54:01
en2              0.0.0.0          82:20:dd:62:54:00
en3              0.0.0.0          82:20:dd:62:54:05
en4              0.0.0.0          82:20:dd:62:54:04
ap1              0.0.0.0          aa:66:5a:27:9a:f0

After Error:

en0              10.10.0.27       88:66:5a:27:9a:f0
awdl0            0.0.0.0          26:3d:9b:0f:4f:96
llw0             0.0.0.0          26:3d:9b:0f:4f:96
bridge0          0.0.0.0          82:20:dd:62:54:01
en1              0.0.0.0          82:20:dd:62:54:01
en2              0.0.0.0          82:20:dd:62:54:00
en3              0.0.0.0          82:20:dd:62:54:05
en4              0.0.0.0          82:20:dd:62:54:04
ap1              0.0.0.0          aa:66:5a:27:9a:f0

[e38BimmerFN]

Check the flash program against working hardware to see if the app connects properly first. There maybe hardware problems at your devices that are in a bad state and thus causing connection problems.

[jclehner]

The issue occurs when assigning the IP address - nmrpflash doesn't spoof the adapter's MAC address. Before running nmrpflash, try assigning a static IP address to en5 using ifconfig. Does that work?

[tnine]

It perhaps might be a linking issue on a previous OSX build? I just built and installed it from the source, and I don't experience this issue.