EFI Removal Step-By-Step

Page 2 of 3

EFI REMOVAL PART 2 OF 3: CABLES & CONNECTIONS

This section explains the type of cables you will need, as well as their correct placements on your Raspberry Pi.

PREREQUISITES

Raspberry Pi set up with Raspbian from Part 1
10 cm GPIO (General Purpose Input/Output) Cables. Click this link for the exact cables that I personally use
SOIC8 Clip (Recommended to use Pomona brand). Click this link for a cheaper model that I personally use
MBA EZ Flash Clip (NO LONGER AVAILABLE!)
Competitor Edition MBA EZ Flash Clip (NO LONGER AVAILABLE!)
Universal EZ Flash Tool (COMING SOON!)

STEP-BY-STEP INSTRUCTION

Use the pictures below as a reference for how to connect your cables. Please note the differences between older Raspberry Pi models and newer ones. The process is exactly the same for all Raspberry Pi models, but VISUALLY it will look as if the cables are placed in different locations. Just know that if you count out the pins, starting with Pin 1, then the placement of the cables is universal amongst all Raspberry Pi Editions.

How to remove EFI Password - EFI Chip Pinout

How to remove EFI Password - Example of cables that I use...

How to remove EFI Password - Raspberry Pi >> VCC+HOLD+WP >> Pin 17

How to remove EFI Password - Raspberry Pi >> MOSI >> Pin 19

How to remove EFI Password - Raspberry Pi >> MISO >> Pin 21

How to remove EFI Password - Raspberry Pi >> SCLK >> Pin 23

How to remove EFI Password - Raspberry Pi >> CS >> Pin 24

How to remove EFI Password - Raspberry Pi >> GND >> Pin 25

Here is a link to the video tutorial EFI Removal Part 2 of 3: Cables & Connections

Comments

+1 #10 4x4muddin89 2018-05-01 11:39

Quoting 0E800:

Quoting 4x4muddin89:
during update and upgrade i received a pipe broken error and i tried to redo it and got "Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?" Do i wipe the micro sd and start from scratch and how do i wipe the pi itself or will wiping the sd wipe the pi as well?

Just reboot and run apt update again. No need to wipe.

upon further research i just ran a line to quit all current processes and tried just the update, and both upgrades separately. Thank you tho, did you mean reboot the pi from the command line right?

Quote

0 #9 0E800 2018-05-01 11:26

Quoting 4x4muddin89:

during update and upgrade i received a pipe broken error and i tried to redo it and got "Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?" Do i wipe the micro sd and start from scratch and how do i wipe the pi itself or will wiping the sd wipe the pi as well?

Just reboot and run apt update again. No need to wipe.

0 #8 4x4muddin89 2018-05-01 11:07

0 #7 0E800 2018-03-01 12:05

Quoting jeimuzujohnson:

I've been attempting to do this procedure on a macbook pro (early 2011) model with chip MX25L6406E. I'm using a Pi 3 and have followed the tutorials exactly. The issue is that when i try to read the chip it only finds "unknown SPI chip (RDID). It ends with an error saying "Read is not working on this chip. Aborting."

When using Flashrom, you need to include/append:
Code:,spispeed=8000

~~Incorrect:~~
Code:


sudo flashrom -V -p linux_spi:dev=/dev/spidev0.0

Correct:
Code:


sudo flashrom -V -p linux_spi:dev=/dev/spidev0.0,spispeed=8000

-1 #6 0E800 2018-03-01 12:00

Most of the initial Raspberry Pi setup can be easily accomplished by using PiBakery:
www.pibakery.org/

Here is the recipe:

-1 #5 jeimuzujohnson 2018-01-24 13:54

I've been attempting to do this procedure on a macbook pro (early 2011) model with chip MX25L6406E. I'm using a Pi 3 and have followed the tutorials exactly. The issue is that when i try to read the chip it only finds "unknown SPI chip (RDID). It ends with an error saying "Read is not working on this chip. Aborting." I know I have the right chip in my command because if I disconnect certain wires from the clip, it can't find the chip at all. I've also tried every power option from having no power to the MB to having magsafe and battery plugged in. I've tried all the combos. I've also tried two different clips and at last two different sets of wires. I still get the error. Is there anyone that knows if there is something I'm missing to be able to read and flash this chip on this MB pro? Thanks!

0 #4 negon 2016-12-28 21:28

Quoting ceojoe09:

So I just attempted this procedure with a MBA,
It seems to have removed the EFI Lock the asks for a password of any length,
but now there is the 4 pin password window.

What could I have done wrong?

I can't say for sure, but my first guess is you didn't immediately clear the PRAM, or the hard drive icloud locked it again.

When you remove the EFI password using this procedure, the next time you boot the machine you need to hold down the following keys at the same time: CMD, OPT, P, R

Hold those keys until it reboots and chimes 3 times.

Now, if the hard drive still has the original Mac OS X installation, you may have to boot to outside media (external hard drive with Mac OS X, etc) and wipe the internal drive to reinstall Mac OS X. Otherwise, the OS may be re-locking the EFI from the icloud service.

0 #3 ceojoe09 2016-12-28 14:25

0 #2 negon 2016-12-21 15:36

I've been trying to do this, but I keep running into the same issue trying to install flashrom. Any ideas?

ghostlyhaks.com/.../...

0 #1 therealjayvi 2016-10-31 01:23

@Asterix

Yes, and no. No this will not work because the raspberry pi is being used for it's GPIO pins and that flashrom can interact with them. Yes this would work if you virtualized a raspberry pi then you would have nothing to connect the clips or adapters to that your computer would be able to read unless you use some of the USB SPI/ISP flashers available on the market.

Interesting thought, though it may take some fiddling to get it to work right. Let me know if you find a method!

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