Efi Lock Imac

The Mission

1. Mac Efi Lock
2. Efi Lock Imac

• How to unlock MAC EFI Icloud with 6 digit PIN Lock passcode Macbook Pro - iMac 1) Add or remove a stick of ram. Obviously if you have one stick in, add one and if you have two in remove one.
• 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.

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.

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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. https://downsfile291.weebly.com/football-frenzy-online.html.

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.

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).

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

Then you need to download the latest flashrom version:

sudo git clone https://github.com/stefanct/flashrom.git Are rabbits good luck.

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

cd flashrom

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…

You purchase a second-hand iPhone only to discover that the device is locked with the previous owner's iCloud account. Of course, you can contact the previous owner and ask him/her to remove the Activation Lock remotely. But what if you can't reach the previous owner? Don't worry. You can still rely on iCloud unlock tool to bypass iCloud Activation Lock from your iOS device.

In this article, we will take a look at some of the best iCloud Activation Lock removal tools for iOS 14/13 in 2020, with their Pros and Cons. Browse through this list and choose your favorite one to get rid of iCloud Activation Lock.

1. Professional iCloud Unlock Tool - FoneGeek iPhone Unlocker

If you are searching for a reliable tool to bypass iCloud Activation Lock, you should not miss FoneGeek iPhone Passcode Unlocker. This software can help you completely remove iCloud account without knowing the password, then you'll be able to create a new account to enjoy all services and features of your iPhone. This iCloud bypass tool is very easy to use, unlocking the Apple ID in just minutes and ensures high success rate of 100%.

Pros:

• Effectively remove Apple ID or iCloud account on iOS device without password.
• Instantly remove all kinds of lock screen from iPhone, iPad or iPod touch.
• No technical skills required to use this iCloud removal tool, making it ideal even for the beginner.
• Fully compatible with all iOS devices including the latest iPhone 12 mini, iPhone 12, iPhone 12 Pro (Max), etc.

Cons:

• It can only unlock Apple ID/iCloud account on activated iPhone or iPad.
• It can only work to bypass iCloud lock on iOS devices running iOS 11.4 or earlier versions.

Here's how to bypass iCloud Activation Lock using FoneGeek iPhone Passcode Unlocker:

Step 1: Download and install FoneGeek iCloud Activation Bypass tool on to your computer, launch the program and choose the 'Unlock Apple ID' in the main window.

Step 2: Connect your iPhone to the computer using USB cable, unlock the device's screen and tap 'Trust' on it.

Step 3: Now click 'Start Unlock' to begin bypassing the iCloud lock on your iPhone. Keep the device connected until the process is complete. When the unlocking process is done, you can log into another Apple ID or create a new one.

2. Free iCloud Activation Lock Removal Tool - iCloudin

iCloudin is a free iCloud activation lock removal tool that can be quite useful for this purpose. It is easy to use and compatible with all iOS device even the latest iOS 14, not to mention that it provides a lot of tutorials to help us using it.

Pros:

• It is free to use and has a very simple and interactive user interface.
• It provides tutorials to help you bypass iCloud Activation Lock.
• It supports all iOS devices, including iPhone 12/11/XS/XR/X/8/7/6s etc.

Cons:

• It is a fairly new tool and there are few reviews to speak to its effectiveness.
• The website hasn't been updated for a long time.

3. Fast Online IMEI-based Unlocking - DoctorUnlocker.net

DoctorUnlock is an online service that allows users to easily unlock their iOS devices without having to install any software on their computers. It is highly effective with a very high success rate and glowing reviews from users. Free computer messaging.

Pros:

• You don't have to install any software on your computer to use this tool.
• It is very easy to use and extremely efficient.
• It has numerous glowing reviews from users.

Cons:

• You'll have to part with $19.95 or more to use the service.
• The most serious problem to unlock iCloud online is data leakage. The sensitive information on your iPhone may be visible to others after using this kind of online tools.
• Most online tools unlock iCloud via brute force, thus resulting in the data damage of your iPhone data.

4. Unlock Service for iCloud - Doulci iCloud Unlocking Tool

Doulci iCloud Unlocking tool is another simple and efficient tool that you can use to bypass iCloud lock on any iOS device, even an iPod Touch. It is not however a UI tool and works by allowing users to run their own iCloud bypass server.

Pros:

• It is very easy to use, allowing you to easily bypass iCloud Activation Lock in just a few minutes.
• It supports all iOS devices, even the latest iPhone 12/11.
• The website provides excellent customer support, detailed tutorials to show you how to use it.

Cons:

• You are required to complete a survey before you can download the tool.
• This service is claimed to be free to download. But when you start to use it, you have to pay for the service.

5. Highly Reliable Tool - Open my iCloud

Usb ports on imac not working. Open My iCloud is another highly reliable tool that you can use to bypass iCloud lock very easily. It is one of the most widely accessible tools in the market for this purpose. It is also very fast and comes with numerous tutorials to help you use the tool whenever you get stuck.

Pros:

• With this tool, you can unlock or bypass your iCloud lock in less than 10 minutes, one of the fastest in the business.
• It works well on all iOS devices and all versions of iOS.
• You can also use it to get the device's IMEI code to unlock the iPhone.

Cons:

• You can only use it on Windows. There is no Mac version.
• It has not been updated for a very long time and it's a bit difficult to download this software online.

6. iCloud Bypass Tool

You may be familiar with iCloud Bypass Tool since it is the most used iCloud Activation Lock bypass and removal tool in the market. The main reason for its increased popularity is its efficiency and ease of use, not to mention that it supports all iOS devices.

Pros:

• It is a very functional tool that can do more than just iCloud Activation Lock removal.
• It has numerous great reviews from previous users who all point to its efficiency.
• It supports all iOS devices.

Cons:

• Some people have complained that it does have a low download speed.
• The rating of this iCloud lock bypass tool is as low as 3.5 star.

7. Simple-to-Use iCloud Bypass Tool - GadgetWide

GadgetWide presents a simple to understand and user friendly iCloud activation tool. It is also very reliable ad works with almost all iOS devices.

Pros:

• It is one of the most reliable tools in the market.
• It is completely free to use.
• It is highly efficient, allowing you to bypass iCloud Activation Lock in just a few minutes.
• It comes with pre-configured settings to make the process even simpler.

Cons:

• You have to download and install the tool on your computer to use it.
• Although it claims to be compatible with all iOS devices, it doesn't work very well with older iPhone models.

8. Official iPhone Unlock

This Official iPhone Unlock site is the service rather than the tool to remove iCloud activation lock. It is also an effective service to unlock iCloud with quite high success rate.

Pros:

• As a professional service, it can be used by everyone without any difficulty.
• It has won great reputation from its purchased users.

Cons:

• This service is not for free. You have to pay $19.95 to obtain the unlock service.

Conclusion

There you have it, the top 8 iCloud Activation Lock Removal tools for 2020. Choose a tool that will suit your needs in your current situation. Keep in mind that each one has its own strengths and weaknesses although we recommend choosing the tool that is the easiest to use. Hope this article can help you get rid of iCloud Activation lock. If you know any other iCloud unlock tool, share us in the comments section below.

By Joan J. Mims

Posted on Sep 09, 2019, 19:35:10

Mac Efi Lock

Joan J. Mims is interested in researching all tips about iPhone, iPad and Android. He loves to share useful ideas with all users.

Efi Lock Imac