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Update README.md
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IsmaelHG authored Apr 28, 2021
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Expand Up @@ -14,11 +14,13 @@ These steps are tested with an MacBookPro Mid 2014 15" using the 431.0.0.0.0 fir
2. When you're done, you should have an 8MB (8.388.608 bytes) file. Make sure you have a backup of this unmodified file
3. Download [UEFIPatch](https://github.com/LongSoft/UEFITool/releases/tag/0.21.5) , it's available for both Windows and Mac
4. Extract the zip and open the extracted folder. You'll see an "patched.txt" file, open it.
5. Add this last line on the file without the quotes: "F7731B4C-58A2-4DF4-8980-5645D39ECE58 10 P:0D00001000F6:0FBAF01490F6 " (make sure to include the space character). You can also replace this file with the [patches.txt](patches.txt) file I uploaded on this repository ![alt text](patches.jpg)
6. Copy the ROM file from step1 into the folder
7. Open a terminal, cd to the extracted folder, type the command "UEFIPatch.exe firmware.bin" or "UEFIPatch firmware.bin" on mac. Don't worry about any "Unknown file system" warning, if it says "Image Patched" you're ready to go. ![alt text](UEFIPatch.jpg)
8. Now you should see a new file "firmware.bin.patched" on your folder with same size as the old file (8.388.608 bytes).
9. Flash this patched firmware with an external programmer and your done
5. Add this last line on the file without the quotes: "F7731B4C-58A2-4DF4-8980-5645D39ECE58 10 P:0D00001000F6:0FBAF01490F6 " (make sure to include the space character). You can also replace this file with the [patches.txt](patches.txt) file I uploaded on this repository
6. ![alt text](patches.jpg)
7. Copy the ROM file from step1 into the folder
8. Open a terminal, cd to the extracted folder, type the command "UEFIPatch.exe firmware.bin" or "UEFIPatch firmware.bin" on mac. Don't worry about any "Unknown file system" warning, if it says "Image Patched" you're ready to go.
9. ![alt text](UEFIPatch.jpg)
10. Now you should see a new file "firmware.bin.patched" on your folder with same size as the old file (8.388.608 bytes).
11. Flash this patched firmware with an external programmer and your done

As you can see, I'm now able to undervolt with my 2014 15" MBP while usign the latest Big Sur 11.3 Update which includes the 431.0.0.0.0 firmware.

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