Hi!
I’m interested on checking if my BootROM is ready to upgrade to 140.0.0.0 (without certificate issues that could brick my cMP)
I currently have a 4,1>5,1 with MP51.089.B00
I only need to run AHT? I’m not sure how to check that.
Thanks in advance
I'm a newbie in this topic, I'll try to answer as best as possible.
While AHT can check for hardware issue (RAM, CPU, etc) on your Mac, it won't detect the certificate issue.
You'll need:
1. ROMTool to dump your ROM (tsialex have it here:
#2458)
- You must disable the SIP first
- When you load the ROMTool, and click the 'dump system rom' you'll be presented with 3 options to choose 'rom chip type', in my case I choose the second option, but I think you can try all the 3 options and produce 3 dump files.
2. use binwalk (you can install it by using home-brew) to analyse the rom dump files.
- usage: binwalk myromdump.bin
If you've got below line from the output of the binwalk, means you've got the certificate issue:
1114112 0x110000 UEFI PI firmware volume
1183848 0x121068 Certificate in DER format (x509 v3), header length: 4, sequence length: 986
1249384 0x131068 Certificate in DER format (x509 v3), header length: 4, sequence length: 986
Cheers