OK... Here are my findings:
Thanks to all for your suggestions. Now, we have a 'solution.'
Tried all above suggestions with no effect. Sometimes an ethernet selection popped up. Sometimes it didn't. But, it never functioned properly.
Was about ready to give up on the whole mess.
Will try this later this evening...
The 'kextstat' query returned the line...
as.acidanthera.mieze.IntelMausi (1.0.4) C53F0812-C897-3747-8B35-32464A0A1EE7 <46 14 6 5 3 1>
So, Mausi is definitely in there. Will try adding smalltree.
Ok... Ready for a little weirdness?
I gave up on the Ethernet for now. But, I copied my edited EFI over to my Big Sur installation USB.
When I tested the USB stick (to see if it would actually boot the system). I selected my usual system volume.
As expected, it booted just fine.
I have tried deleting services and deleting the NetworkInterfaces.plist twice. The ethernet port never shows up and it is not a selection when I try to add a new service in Preferences.
I just updated to OC 0.6.5 Release and reviewed my entire EFI... nothing.
WiFi is working and, the absent...
My thoughts exactly. And, the current cost of a MacPro-actual - decently configured, is never going to make financial sense for my purposes. An intel MacPro refresh clocks us another four to six years of macOS.
Thank you for confirming this. But, I am SO sorry. This problem is with the Z370N-WIFI motherboard indicated in the thread title. I should have been more specific in the body of my post. This board uses the intel I219 controller.
The basic build profile is "SonOfZee" in my signature.
I have loaded the latest release of IntelMausi (1.0.5) in OC/kexts.
Fresh saved snapshot of plist.
Cleared NVRAM several times.
Still cannot get IntelGbE to work. This board uses the I219 variants. But, no joy with any of the current IntelMausi kexts.
Both GbE ports are enabled in BIOS.
The inelegant solution sometimes works best.
I KNEW the plist was spot-on. I just KNEW my drivers, SSDTs and hardware were good.
So, the inelegant solution was to clone a successful installation to an external SSD and try to boot it on the RevengeOfZee build... It worked without complaint. So...
Premature declaration of success on RevengeOfZee build. It didn't work out well and requires a redo.
Boot stick successfully copied installer to NVME.. (I think), which is a Samsung 970 and a known-good drive that has run Mojave and Catalina.
On reboot, I get ONE chance to select the Install...
In Clover, you need to press F1 to get to the menu and then F11 is the selection to reset NVRAM on that menu.
Consequently, I have successfully, if unintentionally, duplicated your problem. One disk had Clover on it from a previous install. I erased the main volume (an NVME SSD) to install OC...
Thanks for the sanity check.
Disabling sip from the terminal allows me to avoid the 'Unknown Developer' block. The terminal solution has always worked well. but, I get that there could be complications.
I've never booted into recovery to disable/re-enable csr-utils. So, this was news to me.
I was trying to do something that Apple doesn't like... I went to disable SIP by the terminal and got a message saying that the command has to be executed from RECOVERY mode.
Is there a way around this? Even on my AppleActuals, this would be a major PitA.
My SonOfZee and RevengeOfZee builds are both updated to 11.1 via clean install. (Replacing Clover w/OC as it refused to update past 5120 on both of these systems.)
OC 0.6.5 w/Prebuilt SSDTs (I'm not that picky) and start from fresh SSD format and a SMBIOS profile change to iMac19,1 from...
Wound up doing a data backup and a clean install using OC 0.6.5 (prebuilt SSDTs though).
Remarkably, it worked perfectly the first time.
I then used the same USB installer on my SonOfZee build with a Z370N-WiFi mainboard with a changed out OTB-compatible WiFi/BT module. I had to switched the...