Fleashed MP4.1 to 5.1 lost Ethernet

billaras

macrumors newbie
Original poster
Jan 9, 2016
4
0
Germany
Hi there,

last week I flashed my MP4.1 to 5.1 with netkas FW tool.
All went flawlesly and I could install High Sierra after applying the required FW Update.
All went trough without any problem.
This worked out for the next 3 days.
Suddenly on day four I noticed that I had no Ethernet connection and I could not connect to appstore.
Since that day the System Profiler shows "No Ethernet Adapter installed".
I ´ve tried to reset SMC and NVRAM several Times ,but no joy,the ethernet ports are gone.
Any chance to get them back?

Thanks in advance.
 

tsialex

macrumors 603
Jun 13, 2016
5,613
6,440
Brazil
Hi there,

last week I flashed my MP4.1 to 5.1 with netkas FW tool.
All went flawlesly and I could install High Sierra after applying the required FW Update.
All went trough without any problem.
This worked out for the next 3 days.
Suddenly on day four I noticed that I had no Ethernet connection and I could not connect to appstore.
Since that day the System Profiler shows "No Ethernet Adapter installed".
I ´ve tried to reset SMC and NVRAM several Times ,but no joy,the ethernet ports are gone.
Any chance to get them back?

Thanks in advance.
This could be related to the NVRAM corruption, but is just a guess without a dump to check.

Another thing, the ethernet firmware, MAC addresses and basic configuration are not stored into the Mac Pro BootROM, each ethernet port has a dedicated SPI flash. One of the Ethernet ports have the SPI on the underside of the backplane and the other is located near the Realtek audio chipset.
 

billaras

macrumors newbie
Original poster
Jan 9, 2016
4
0
Germany
This could be related to the NVRAM corruption, but is just a guess without a dump to check.

Another thing, the ethernet firmware, MAC addresses and basic configuration are not stored into the Mac Pro BootROM, each ethernet port has a dedicated SPI flash. One of the Ethernet ports have the SPI on the underside of the backplane and the other is located near the Realtek audio chipset.
Hi Alex and thanks for the quick reply.

So what I ´m suppose to do?
Can I somehow dump the NV RAM ?
 

tsialex

macrumors 603
Jun 13, 2016
5,613
6,440
Brazil
Hi Alex and thanks for the quick reply.

So what I ´m suppose to do?
Can I somehow dump the NV RAM ?
You can't dump just the NVRAM, you dump the full BootROM with ROMTool.

After you dump your BootROM, you can flash the generic MP51.fd from Mojave 10.14.2, 140.0.0.0.0, and check if the Ethernet ports magically work again. If so, it's NVRAM corruption.
 

billaras

macrumors newbie
Original poster
Jan 9, 2016
4
0
Germany
You can't dump just the NVRAM, you dump the full BootROM with ROMTool.

After you dump your BootROM, you can flash the generic MP51.fd from Mojave 10.14.2, 140.0.0.0.0, and check if the Ethernet ports magically work again. If so, it's NVRAM corruption.

Could this be done with the full Mojave Installer I have lying here around?