Run through the setup, and you’ll be on the Activation Lock screen. Here I bypass this iCloud activation lock screen with all the saved files in the Activation folder on the desktop. Click on the Relay Device Info on Sliver; here on the popup, you have some instructions to bypass activation after the unlock forgot iPhone passcode steps.

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macOS provides multiple methods to protect the data on a Mac: a user account password, encryption via FileVault, and optional low-level security measure that prevents starting up from storage devices other than the selected startup disk. That's known as the firmware password or EFI (Extensible Firmware Interface) lock, which will also block the user's ability to use all startup key combinations, except the NVRAM or PRAM reset combinations. This command (Option + Command + P + R), however, will initiate the machine from macOS Recovery instead.

The Lost Mode feature of Find My Mac will remotely lock the Mac with a firmware password for one-time use. The user's Mac receives the lock instruction from iCloud, restarts, and asks for the system lock PIN code that they set up. After entering the passcode the Mac starts up from the designated startup disk and disables the passcode.

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1. With the IMEI number of your handset, it is possible to remove the iCloud lock on any Apple device. It was little known before, but the IMEI code plays a vital role in case you are in need to bypass the activation lock which prevents you from using your device in a normal way.
2. Cult of Mac confirmed that the email did in fact come from Apple. The hack, which is the first of its kind, bypasses the iCloud security system for locked iOS devices called Activation Lock.
3. Photo: Jim Merithew/Cult of Mac The recently revealed exploit that allows anyone to bypass the iPhone’s Activation Lock system is a rather simple process that requires adding just a single line of.
4. There is no way to hack the iCloud Activation Lock and if you go for a ”special” tool that will bypass the iCloud Activation Lock Screen you will spend your money for nothing. If there is no original owner’s personal data on the iCloud Activation Lock Screen then you should skip to this FMI Removal Guide.

A firmware password is not the same as the administrator password or login password. It's a separate password that appears immediately after boot and must be entered into the system lock screen, which appears as a lock symbol on either a black or a gray background.

Firmware Passcode Security

Low-level passwords are quite secure, which also means there is potentially a headache if the password is forgotten. If you or any of your users can't remember the firmware password or passcode, know that Apple doesn’t allow for any workarounds, but instead recommends scheduling a service appointment with an Apple Store or Apple Authorized Service Provider. The process requires the original receipt or invoice as proof of purchase.

Earlier versions of macOS required manual installation of the firmware but, starting in 2015, Apple began bundling EFI updates with the macOS updates in order to deliver security patches to all users. But as security firm Duo Labs discovered in late 2017, some Macs aren't getting the right firmware, which makes them vulnerable to hackers. They recommend checking the firmware version and updating if needed.

Firmware Passcode Location

On Intel-based Macs shipped before 2011, the firmware password was stored in the PRAM and read by the system EFI firmware before other PRAM variables. That lead to a serious security issue, allowing the firmware to be revealed in a native macOS app and weakening the enhanced security Apple had hoped to introduce with the addition of the firmware password.

In 2011, however, Apple added an important change to the system: the firmware password was moved to a separate programmable controller from Atmel. This component contains lockable flash memory to store the password and requires special programming with identifier numbers for both the Mac's motherboard and the Atmel chip to access and reset it.

Since the controller is an independent component, the only way to bypass it is to manually remove it from the motherboard, but this requires highly precise reflow soldering tools and techniques.

Bypassing the Mac Firmware Password on MacBooks With Upgradeable RAM

This hardware hack works on both Intel- and Motorola-based MacBooks and requires users to remove the RAM and reinstall it. You can check our guide on how to upgrade the RAM on Macs for further reading.

1. Shut down your computer and remove the battery.
2. Locate your RAM, remove one of the RAM modules and put it aside.
3. Put the battery in, and boot your computer while holding the Command + Option + P + R keys to reset the parameter RAM.
4. Wait for the chime to sound three times.
5. Release the keys and shut down the computer.
6. Remove the battery again, and reinsert the RAM module.
7. Put the battery back in.
8. Boot up your Mac, and you should not see the firmware lock again.

Disable the Password With Firmware Password Utility

1. Restart your Mac while holding down the Command + R keys to enter Recovery Mode.
2. When the Utilities screen appears, go the Utilities menu bar, and select “Firmware Password Utility”.
3. Choose to turn the Firmware Password off.

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If none of the above methods worked, there are still two more options to try: either have Apple do it for you, so long as you have the original receipt or invoice, or alternatively use any of the EFI lock bypass hardware kits available for sale on various sites. In using one of these EFI lock hardware bypass methods you’ll almost certainly void your warranty, so it is down to you whether you want to risk the procedure.

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The Mission

There has been much controversy on removing the firmware lock on a MBP, MBA, or similar Mac’s. The MBA is a bit more complicated without a specialty tool to interface with a header on the board. We use to have to remove the board, scratch back traces, and solder directly to them which can be seen in EX-1.1. This is just short of replacing the entire chip, which is what we are all trying to avoid right? I also have a project I have been forking on called the iFLRT (Firmware Lock Removal Tool) that can be found HERE. Donate what you can to keep my development process alive, every little red cent helps.

First you need to understand what the firmware lock is and how removing it will affect you. Then maybe you will be able to decide if this procedure is for you. In most cases a MBP has been purchased from a third party who may have stolen it or simply forgotten to remove their iCloud account. In this case the symptoms would be a four digit pin lock when the OS loads. When you try to do a re-install you are met with a lock screen shown in EX-1. This is the result of the Mac being most definitely locked from the cloud. There are two options from this point which are explained below.

EX-1

EX-1.1

NOTE: If you have a 2010 model MBP or earlier all you have to do is change the amount of RAM in your MBP and clear the PRAM. This is all you have to do to get past OS lock. But you will still have a firmware lock as far as I know as in many cases this has happened. There have been occasions where the firmware lock has also been removed but I cannot contest to any exact models. Remember to set the Mac up like new and register the Mac with a new iCloud account to avoid any future lock-downs.

Option A: You can assume that a firmware lock was never set and brute force the firmware lock with a HID device such as a Teensy. This operation can take quite a while because it has to go through 10,000 iterations of possible pass-phrases in the worst case scenario. This will ONLY work if it was set by the iCloud!

Option B: You can assume that a firmware lock was indeed implicated when the MBP was set up and that the brute force method will not work. This can save you time but requires you to have a SPI programmer at hand such as the Bus Pirate or in this case a Raspberry Pi.

In A Nutshell

I won’t waste time on the brute force method as I believe it isn't relevant in most cases. I will focus on the process of flashing the EFI chip that is usually easily accessible by removing the Macs’s back-plate, either by a small 15X2 header, 17X2 header, or the 8 pin SOIC chip itself. You can see an image of the SOIC8 chip in EX-2 and the header in EX-2.1. The process is simple but requires a bit of knowledge in micro controllers. I will use the easiest and cheapest route that I know. The process goes briefly like this:

EX-2

EX-2.1

Step 1 – Buy a SPI programmer such as the Raspberry Pi and a clip to interface with the chip. You can find the Pi on eBay, doesn't matter what model and you can find the Pomona SOIC8 clip there as well, usually with the female-to-female wires included. If you have a MBA then you can contact me about purchasing a clip for the header.

Step 2 - Read the chip three times and verify MD5 check-sum to ensure you have a good backup if things go wrong.

Step 3 – Make a copy of the dump and open it in a hex editor. I use Notepad ++.

Step 4 - Search for “$SVS” in the dump and you should find 2 instances. The first instance is what you will need to clear out making sure to keep the file length the same. It is safe to replace it with an empty value such as “ÿ”. The string including the $SVS should be replaced, you can copy and paste a portion of the string below if needed. each 'ÿ' is 2 bits and 8 bits make a byte So keep that in mind when you replace the string. The file size has to be exactly the same size as the chip or it will return an error.

This is an example of what to replace in a hex editor.

Step 4.1 – Get a clean dump that is not firmware locked from the community making sure you use the correct EMC and processor architecture. Make absolutely sure it is the same size as your original dump which is usually 2, 4, or 8 MB. If you go this route then you will need to replace the serial of the donated dump with your own serial in order to not register over their Mac. You can do this my simply searching for 'override-version' and on that same line there will be an 11 to 12 digit serial number that you will replace with your own. I also have a repository found HERE which you can use to search for your EMC number and I may have a clean dump.

Step 5 – Hook your programmer up to the chip, erase the chip, write the new dump and verify it.

Step 6 – Remove the clip and turn your Mac over to turn it on and test. You will immediately use the hot-keys to get to single user mode to test.

Step 7 – If you do not get to SU mode or the Mac does not boot right you will need to erase the chip and write the old dump back to it. You then can exhaust other options.

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Step 7.1 – If you do get to SU mode turn the Mac back off and use the hot-keys to clear the PRAM. This will get rid of the 4 digit lock at OS load. Or you can simply re-install at this point. Remember to register the Mac to a new iCloud account to avoid future lock downs.

NOTE: Here are a few things worth mentioning..

• Make sure your chip is supported in Flashrom which is the program you will be using to talk to the chip.
• You need to make sure the clip makes a solid connection to avoid misreads.
• You need to verify your chips datasheet to correctly identify the pin-out to the SPI programmer.
• The wires connecting the clip to the SPI programmer need not be any longer than 8 cm.
• The battery may need to be connected due to voltage drop in special cases (RARE).
• The power cable should be removed from the Mac during the entire process, up until boot time testing.
• Always make sure to back up your original dump and verify the write.
• Optionally you can wire in resistors between the SPI programmer and the clip on the 3.3v pins.

That is the entire process in a nutshell. Now I will explain how you can do this in as much detail as possible. The first thing that you will need to do is pick up your entire inventory before you begin. After that lay everything out and do some testing. Make sure your chip is supported having the datasheet and any diagrams available. I also suggest after you get the clip connected to all the wires you check for continuity from the clips pins to the end of the F-F wires on each pin.

Down And Dirty

NOTE:Read this guide in its entirety before you attempt to do anything to your Mac; Read it twice if you have to. I would also like to take this time to tell you that I am not responsible for any damages to your personal property or your physical/mental wellness if the guide is used. There is no guarantee, implied or expressed, in this procedure. You are following this guide knowingly and accept that damaging your property may be the outcome. Although I do not for see that being the case as I have tested this method many times. With that being said, let’s get started.

This is the list of things you will need in order to successfully and easily fix your MBP:

• Raspberry Pi (Doesn't matter what version) with power supply and an SD card with Rasbian installed.
• 8 Pin Pomona SOIC clip or my EFI Easy Flash clip.
• 8 Female-to-Female wires.
• Flashrom.
• Your chip's datasheet (To verify the chips pin-out and voltage requirements).

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Now, I am going to assume that you at least have some experience in Linux and basic troubleshooting skills. You will run into problems and they are not all going to be the same as everyone else’s problems. So critical thinking is also required although I have not added it to the list. When you have your Raspberry Pi all set up and Raspian is booted up you will need to set it up for the first time. if you have already set it up go to the terminal and type:

sudo raspi-config

While in this configuration screen make sure to turn SPI on under Advanced. You may also turn on SSH if needed.

Then you will need to do an update by typing:

sudo apt-get update

Followed by an upgrade:

sudo apt-get upgrade

Optionally doing a distrobution upgrade:

sudo apt-get dist-upgrade

Now we have to install a few libraries that Flashrom relies on:

sudo apt-get install pciutils

sudo apt-get install libftdi-dev

sudo apt-get install libusb-dev

sudo apt-get install libpci-dev

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Then you need to download the latest flashrom version:

sudo git clone https://github.com/stefanct/flashrom.git

It will be downloaded into a folder called 'flashrom' so change directory into the folder:

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And make it:

sudo make

Then install it:

sudo make install

Now we need to modify the blacklist by commenting out the SPI entry if it exists:

Sudo nano /etc/modprobe.d/raspi-blacklist.conf

You will need to put “#” in front of the line that reads blacklist spi-bcm2708 effectively commenting it from the configuration file. If there is nothing in the file don't worry about it, that means SPI is not blacklisted. You can then save by hitting CTL+X, Y, and ENTER. You will then need to hook the wires up to the Pi and to the clip according to the diagrams below and your chip's datasheet. In MOST cases it will be just like what you see below.

The actual pinout for most 25 series chips depicted above is as follows for those of you who need a more definitive answer:

• Pin 1 of the chip (marked with a small dot) which is CS (Chip Select) goes to pin 24 on the Raspberry Pi.
• Pin 2 of the chip which is MISO (Master Oin Slave Out) goes to pin 21 on the Raspberry Pi.
• Pin 3 of the chip which is WP (Write Protect) goes to pin 17 on the Raspberry Pi. (Usually Not Needed)
• Pin 4 of the chip which is GND (Ground) goes to pin 25 on the Raspberry Pi.
• Pin 6 of the chip which is MOSI (Master Out Slave In) goes to pin 19 on the Raspberry Pi.
• Pin 7 of the chip which is HOLD (Hold) goes to pin 17 in the Raspberry Pi. (Usually Not Needed)
• Pin 8 of the chip which is VCC (Positive Supply Voltage) goes to pin 17 on the Raspberry Pi (3.3v)

Connect the wires on the clip to the Raspberry Pi making sure it is turned off following the diagram above. The GPIO pin that is closest to the corner of the Raspberry Pi is pin 2, keep that in mind or read the manual. After you are all connected you will place the clip on the chip snugly and turn the Pi on. Go to your working directory and run the following commands using some discretion.

**Start of the Flashrom process**

Get to the help page:

sudo flashrom --help

List the supported chips:

sudo flashrom –L

Read the flash chip by using the below command three times:

sudo flashrom –r ~/efi/read1.bin -V -p linux_spi:dev=/dev/spidev0.0

Erase the chip after you have verified all three reads have a matching MD5 hash:

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

Using the methods explained above either modify or get a clean dump making sure it is the same size as the original ROM and write it to the chip:

sudo flashrom -w ~/efi/new.bin -V -p linux_spi:dev=/dev/spidev0.0

Verify the chips contents with the file that you just wrote to ensure its integrity:

sudo flashrom -v ~/efi/bnew.bin -V -p linux_spi:dev=/dev/spidev0.0

If you have not run into any problems you will have a freshly flashed chip. If you did run into issue, use the forum here to start a thread and we will help you troubleshoot your error messages. The reason I always use the –V command is to ensure a verbose output. At this point shut your Pi down and then remove the clip. You will then replace your power supply to the Mac and then turn it on using hot-keys to try and get to SU mode. If you get to SU mode you will shut back down and use the hot-keys to clear PRAM and reinstall setting the Mac up as a new machine. Make sure to register it with a newly created or existing iCloud account to prevent further incidents. If you did not get to SU mode you will need to erase your chip and try again.

That’s it folks, this is the long awaited guide that has more than enough information to get you through the process. It is specifically designed to save you money in the recovery of your Mac and to seamlessly work through any prior issues you may have had using Flashrom with a windows PC. If this guide has helped you please think about the years of work I have spent making this possible for you and donate to my iFLRT project to make it even easier for others. Or you can donate to me by using the slider on the edge of the left hand side of the page to donate to my personal PayPal account. Good luck to you all and Happy Hunting…