Remove EFI lock for MBA


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7 years 8 months ago #3923 by enaw
Replied by enaw on topic Remove EFI lock for MBA
"Model A1466 EMC 2559"

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7 years 8 months ago #3924 by enaw
Replied by enaw on topic Remove EFI lock for MBA
Well I stopped after the "sudo make install". The installation of the latest flashroom version.
I was stuck on the "sudo nano /etc/modprobe.d/raspi-blacklist.conf"

I started all the process with the "sudo raspi-config".
Before this, Ghost wrote 7 steps I never succeeded to follow. I was stuck on step 2, "read the chip 3 times and verify md5 check-sum to ensure you have a good backup if things go wrong".
I think I need notepad ++, a program on raspberry pi ? Hex editor aswell ?

If you think it's too risky to do it without these 7 steps done, may be we should go back on this first.

Thank you again for your help, and sorry to be such a beginner about all of this.

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7 years 8 months ago #3925 by CygnusX1
Replied by CygnusX1 on topic Remove EFI lock for MBA

enaw wrote: Well I stopped after the "sudo make install". The installation of the latest flashroom version.
I was stuck on the "sudo nano /etc/modprobe.d/raspi-blacklist.conf"

I started all the process with the "sudo raspi-config".
Before this, Ghost wrote 7 steps I never succeeded to follow. I was stuck on step 2, "read the chip 3 times and verify md5 check-sum to ensure you have a good backup if things go wrong".
I think I need notepad ++, a program on raspberry pi ? Hex editor aswell ?

If you think it's too risky to do it without these 7 steps done, may be we should go back on this first.

Thank you again for your help, and sorry to be such a beginner about all of this.


I use HxD hex editor on a windows box to edit the dump file. I would not recommend notepad ++ at all!

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7 years 8 months ago #3926 by reverendalc
Replied by reverendalc on topic Remove EFI lock for MBA
There are tons of serviceable hex editors. I use iHex on my Mac and there's even a decent graphical hex editor you can run on the pi, I forget the name.

When you said you were stuck on editing the blacklist-conf, does that mean you didn't complete that step?

If you don't configure the pi and the wiring correctly, it's sure not to work.

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7 years 8 months ago #3928 by enaw
Replied by enaw on topic Remove EFI lock for MBA
No I didn't even start the blacklist step.
Alright I do have to do the 7 steps first then.

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7 years 8 months ago #3929 by reverendalc
Replied by reverendalc on topic Remove EFI lock for MBA
It's all quite simple, and laid out step by step. Each instruction does play a key role in preparing your raspberry pi to work, so make sure you complete them and achieve the desired result.

If you are struggling with something, just ask for help

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7 years 8 months ago #4061 by enaw
Replied by enaw on topic Remove EFI lock for MBA
Well I feel ashamed to say that, but I don't have a clue about how to do this.
I don't understand step 2, what is this chip I should read 3 times ? Is it the thing in the mac where I will plug the clip ?
I don't even know what MD5 check-sum is... It will be hard to verify it.

Sorry but I never did such things.

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7 years 8 months ago #4062 by reverendalc
Replied by reverendalc on topic Remove EFI lock for MBA
No need for shame... Everybody has a first time. Perhaps your prerequisite knowledge is less than others... But the step by step directions should help you through the process without fully understanding what you're doing.

I'm sure many people will be happy to lend help, however we can't come do it for you so you'll have to let us know exactly where you are in the process, what you're stuck on, and any errors you're receiving.

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7 years 8 months ago #4063 by enaw
Replied by enaw on topic Remove EFI lock for MBA
Thank you a lot for your patience !

Right now I'm on the step 2. I have to read 3 times the chip. But I'm not sure on what it is, and so I don't know how to read it 3 times.

Then, in the same step I have to verify MD5 check-sum, but same problem, don't know what it is and how to do it.

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7 years 8 months ago #4064 by CygnusX1
Replied by CygnusX1 on topic Remove EFI lock for MBA

enaw wrote: Thank you a lot for your patience !

Right now I'm on the step 2. I have to read 3 times the chip. But I'm not sure on what it is, and so I don't know how to read it 3 times.

Then, in the same step I have to verify MD5 check-sum, but same problem, don't know what it is and how to do it.


Attach your first read in the "zip" format and upload it here. We will take a look at it. :)

If I helped you buy me a latte!

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7 years 8 months ago #4065 by reverendalc
Replied by reverendalc on topic Remove EFI lock for MBA
Have you successfully read the chip? Assuming you did, and did so three times, you'll have read1.bin read2.bin and read3.bin (or whatever you named them)

Then type "md5sum read1.bin read2.bin read3.bin" without quotation.

It should display identical output for all three files.

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7 years 8 months ago #4069 by enaw
Replied by enaw on topic Remove EFI lock for MBA
No I haven't. How do I read the chip ?

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7 years 8 months ago #4073 by reverendalc
Replied by reverendalc on topic Remove EFI lock for MBA
Connect your raspberry pi or other programmer to the ezflash tool, and connect that to the service connector on the logic board.

Then (on your pi if so equipped) run the flashrom read command.

Again, you're not giving us any information about where are you are in the process or what's holding you back.

Do you have the pi connected to the ezflash? Do you have the ezflash connected to the logic board? If flashrom is giving you an error, what error is it?

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7 years 8 months ago #4078 by enaw
Replied by enaw on topic Remove EFI lock for MBA
Oh sorry I didn't understand you well before. No I didn't start to connect anything. I will try and tell you.

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7 years 8 months ago #4082 by reverendalc
Replied by reverendalc on topic Remove EFI lock for MBA
Just copy&paste (from the guide) which step you are stuck on.

Tell us what (if anything) you've done so far

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7 years 7 months ago #4187 by enaw
Replied by enaw on topic Remove EFI lock for MBA
All I did was testing my raspberry pi, discovering it.

I didn't do the 7 steps.

I went to the terminal and tested almost all the "sudo" in the guide we must type after the 7 steps.

I started with "sudo raspi-config" and finished on "sudo make install".

But that was just to test my raspberry, if I want to unlock the mac, I will have to do the 7 steps I never did first, and then I will have to type those sudo again.

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7 years 7 months ago #4188 by enaw
Replied by enaw on topic Remove EFI lock for MBA
Now I'm still stuck on the step 2, reading the chip 3 times.

But before I do anything, I have to do what you said:
" Connect your raspberry pi or other programmer to the ezflash tool, and connect that to the service connector on the logic board. "
Right ?

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7 years 7 months ago #4190 by CygnusX1
Replied by CygnusX1 on topic Remove EFI lock for MBA
yes

If I helped you buy me a latte!

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7 years 7 months ago #4195 by enaw
Replied by enaw on topic Remove EFI lock for MBA
Hello guys,

I took photos of my logic board and how I connected the flashtool to it.
Flashtool is connected to the raspberry pi.


Before I do anything I let you check if everything is alright.

File Attachment:

File Name: drive-down...040Z.zip
File Size:28,142 KB
Attachments:

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7 years 7 months ago #4196 by reverendalc
Replied by reverendalc on topic Remove EFI lock for MBA
Yes, that is the correct place and orientation for the clip. Which year is your MacBook Air again? The clip has two pinouts via the switch.

I think we've already gone over your wiring from the clip to the pi, right?

Perhaps you're ready to try a read operation.

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