MP 1,1-5,1 MP5,1: EFI Release vs BIOS Version vs BootBlock Version Reference Table:

[andrewkhoo]

While it's easy to confirm if your Mac Pro firmware have SecureBoot certificates inside the NVRAM volume, just run binwalk with your BootROM image dump and see if the output show any X.509 certificates inside, SecureBoot is just a red-herring.

The real problem is the NVRAM data/variables/entries not being erased anymore and the NVRAM volume part of the BootROM self destructing over the years. SecureBoot just makes this process much faster since the certificates/DBs/PKs occupy so much valuable space inside the NVRAM volume.

I've sent you a PM with instructions.

Hi Alexandre, thank you for the reply! hopefully you can repair that old lady of mine.

 

[andrewkhoo]

While it's easy to confirm if your Mac Pro firmware have SecureBoot certificates inside the NVRAM volume, just run binwalk with your BootROM image dump and see if the output show any X.509 certificates inside, SecureBoot is just a red-herring.

The real problem is the NVRAM data/variables/entries not being erased anymore and the NVRAM volume part of the BootROM self destructing over the years. SecureBoot just makes this process much faster since the certificates/DBs/PKs occupy so much valuable space inside the NVRAM volume.

I've sent you a PM with instructions.

much appreciated for your help, thank you tsialex! god knows what might happen if we didn't manage to connect here. I'm so grateful that you took the time to explain the steps in detail and, it works, even for a low-tech person like me.

 

[dksoutha]

Just seeking clarification: I suppose that since my 4,1 is flashed to 5,1 I must follow the 5,1 directions for reconstructing my NVRAM?

 

[Macschrauber]

Yes

 

[tsialex]

Who would bet that one more EFI release would be found and dumped after all these years? Better yet, one earlier than all others!

Yes, thanks to @Edge, now we have the dump and the data for MP41.0081.B03:

EFI Release vs BIOS Version vs BootBlock Version Reference Table:

EFI Release:	BIOS Version:	BootBlock Version:
MP41.0081.B03	MP41.88Z.0081.B03.0902231259	AAPLEFI1.88Z.0004.I00.0901121311 (this could be from an earlier BootROM)
MP41.0081.B04	MP41.88Z.0081.B04.0903051113	AAPLEFI1.88Z.0004.I00.0901121311 (this could be from an earlier BootROM)
MP41.0081.B??	MP41.88Z.0081.B??	AAPLEFI1.88Z.0004.I00.0908061259
MP41.0081.B07	MP41.88Z.0081.B07.0910130729	AAPLEFI1.88Z.0004.I00.0910130728
MP41.0081.B08	MP41.88Z.0081.B08.1001221313	AAPLEFI1.88Z.0004.I00.1001221311
MP51.007F.B00	MP51.88Z.007F.B00.1008031144	AAPLEFI1.88Z.0005.I00.1006041028
MP51.007F.B??	MP51.88Z.007F.B??	AAPLEFI1.88Z.0005.I00.1007141219
MP51.007F.B01	MP51.88Z.007F.B01.1008231310	AAPLEFI1.88Z.0005.I00.?
MP51.007F.B02	MP51.88Z.007F.B02.1009221128	AAPLEFI1.88Z.0005.I00.?
MP51.007F.B03	MP51.88Z.007F.B03.1010071432	AAPLEFI1.88Z.0005.I00.1010071430
MP51.0083.B00	MP51.88Z.0083.B00.1707271620	AAPLEFI1.88Z.0005.I00.1707271617
MP51.0084.B00	MP51.88Z.0084.B00.1708080528	AAPLEFI1.88Z.0005.I00.1708080525
MP51.0085.B00	MP51.88Z.0085.B00.1802021746	AAPLEFI1.88Z.0005.I00.1802021742
MP51.0087.B00	MP51.88Z.0087.B00.1804181525	AAPLEFI1.88Z.0005.I00.1804181521
MP51.0089.B00	MP51.88Z.0089.B00.1806081708	AAPLEFI1.88Z.0005.I00.1806081704
138.0.0.0.0	MP51.88Z.F000.B00.1807300628	AAPLEFI1.88Z.0005.I00.1807300627
139.0.0.0.0	MP51.88Z.F000.B00.1808171030	AAPLEFI1.88Z.0005.I00.1808171029
140.0.0.0.0	MP51.88Z.F000.B00.1809191555	AAPLEFI1.88Z.0005.I00.1809191554
141.0.0.0.0	MP51.88Z.F000.B00.1812191621	AAPLEFI1.88Z.0005.I00.1812191620
142.0.0.0.0	MP51.88Z.F000.B00.1902142049	AAPLEFI1.88Z.0005.I00.1902142048
144.0.0.0.0	MP51.88Z.F000.B00.1904121248	AAPLEFI1.88Z.0005.I00.1904121247

Also, this indicates that the BootBlock versions for MP41.0081.B03 and MP41.0081.B04 could be not correct and the Mac Pros were upgraded from a previous release - BootBlocks are never upgraded by efiflasher when the EFI is upgraded.

BootBlock version AAPLEFI1.88Z.0004.I00.0901121311 is probably from MP41.0081.B02 or something.

 

[Edge]

Who would bet that one more EFI release would be found and dumped after all these years? Better yet, one earlier than all others!

Yes, thanks to @Edge, now we have the dump and the data for MP41.0081.B03:

Thanks @tsialex for reconstructing the ROM for this replacement machine. It only took me 14 months to send you the files once I had dumped it! After 12 years I hope it was worth the wait!

 

[itiot]

Thank you for this guide. i used to make the firmware files for 2 machines. and its working good!