Apple MacBook Pro A1502 (820-3476-A)

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  • rensopineda
    New Member
    • Oct 2021
    • 2
    • Dominican Republic

    #81
    Hello friends!
    I have a macbook A1502
    820-3476-A EMC2875
    SN: C02N5B75G3QH.
    With the EFI chip damaged by humidity, it cannot be read, it is shorted.
    Could you help me with EFI dump?​
    Thanks

    Comment

    • Xiran
      Member
      • Jan 2019
      • 42
      • Qro

      #82
      Originally posted by rensopineda
      Hello friends!
      I have a macbook A1502
      820-3476-A EMC2875
      SN: C02N5B75G3QH.
      With the EFI chip damaged by humidity, it cannot be read, it is shorted.
      Could you help me with EFI dump?​
      Thanks
      Hi @rensonpineda,

      You can check right here, there are dumps of what you ask for. But if it is shorted, you have to unsolder it, and check it, if it is the integrated one, you will have to change it.

      Comment

      • rensopineda
        New Member
        • Oct 2021
        • 2
        • Dominican Republic

        #83
        Originally posted by Xiran

        Hi @rensonpineda,

        You can check right here, there are dumps of what you ask for. But if it is shorted, you have to unsolder it, and check it, if it is the integrated one, you will have to change it.
        Remove the IC from the board, it is dead and cannot be read. I already have a new IC ordered from eBay to reprogram with a new dump that has a clean ME, that's why I have asked for help here, so as not to write any dump and give the board so much heat.

        Comment

        • Xiran
          Member
          • Jan 2019
          • 42
          • Qro

          #84
          Originally posted by rensopineda

          Remove the IC from the board, it is dead and cannot be read. I already have a new IC ordered from eBay to reprogram with a new dump that has a clean ME, that's why I have asked for help here, so as not to write any dump and give the board so much heat.
          I have exactly the same card, what is the advantage of using it with clean ME?

          Comment

          • Xiran
            Member
            • Jan 2019
            • 42
            • Qro

            #85
            Originally posted by rensopineda

            Remove the IC from the board, it is dead and cannot be read. I already have a new IC ordered from eBay to reprogram with a new dump that has a clean ME, that's why I have asked for help here, so as not to write any dump and give the board so much heat.
            Can I ask you a favor? Could you take a photo of your battery from the front and back?
            Thanks in advance.​

            Comment

            • Duvelhedz
              Member
              • Oct 2015
              • 20
              • United Kingdom

              #86
              Here is a version with clean ME region that can be serialised using the Apple Blank Board Serialiser software from a USB drive.
              Just flash and use the BBS software to set the serial number. Checksums will pass just fine. This is a post 2018 ROM so will naturally have APFS support.

              Attached Files

              Comment

              • Xiran
                Member
                • Jan 2019
                • 42
                • Qro

                #87
                Originally posted by Duvelhedz
                Here is a version with clean ME region that can be serialised using the Apple Blank Board Serialiser software from a USB drive.
                Just flash and use the BBS software to set the serial number. Checksums will pass just fine. This is a post 2018 ROM so will naturally have APFS support.
                Thx!

                I´ll check it, one question, did you have the commands to do it without desolder and resolder the chip? I´ve do this around 50 time or more in my board testing diferent bios... =(

                Comment

                • dennis akumu
                  Senior Member
                  • Mar 2018
                  • 103
                  • kenya

                  #88
                  Macbook pro A1502 With no display, need clean me plizz
                  board/no: 820-3476-A.
                  S/N: C02M4JB9FH00
                  ME865N
                  Attached Files

                  Comment

                  • peste
                    Super Moderator
                    • Dec 2016
                    • 12676
                    • ROMANIA

                    #89
                    Originally posted by dennis akumu
                    Macbook pro A1502 With no display, need clean me plizz
                    board/no: 820-3476-A.
                    S/N: C02M4JB9FH00
                    ME865N
                    try..
                    Attached Files
                    Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:

                    >>>>> https://www.badcaps.net/index.php?pageid=donate1 <<<<<

                    Every donation made will go towards server fees and maintenance costs.

                    Comment

                    • virusjez
                      Member
                      • Jun 2017
                      • 28
                      • Philippines

                      #90
                      pls clear me..very slow..after i change smc
                      SN:C02N38DNG3QH
                      Attached Files

                      Comment

                      • peste
                        Super Moderator
                        • Dec 2016
                        • 12676
                        • ROMANIA

                        #91
                        Originally posted by virusjez
                        pls clear me..very slow..after i change smc
                        SN:C02N38DNG3QH
                        post full name and model, motherboard model, EMC,etc.

                        Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:

                        >>>>> https://www.badcaps.net/index.php?pageid=donate1 <<<<<

                        Every donation made will go towards server fees and maintenance costs.

                        Comment

                        • xZINTANIx
                          New Member
                          • Jul 2025
                          • 3
                          • Libya

                          #92
                          Apple MacBook Pro A1502 (820-3476-A)

                          Macbook pro A1502
                          Main-Board : 820-3476-A
                          Serial n° : C02N655DG3QH
                          EMC2875

                          can anyone could help me. my macbook doesn't boot anymore my bios files got corrupted after i tried to remove the efi lock

                          I need the file and someone to guide me to flash it

                          Comment

                          • xZINTANIx
                            New Member
                            • Jul 2025
                            • 3
                            • Libya

                            #93
                            **[HELP] MacBook Pro A1502 - 820-3476-A - BIOS Corrupt - Need Clean Dump**
                            Hello everyone,

                            My MacBook Pro A1502 (EMC 2875) won’t boot anymore after I attempted to remove the EFI lock and accidentally corrupted the BIOS.

                            🔧 Specs:
                            - Model: MacBook Pro Retina A1502
                            - Logic Board: 820-3476-A
                            - Serial Number: C02N655DG3QH
                            - EMC: 2875

                            I’m looking for:
                            - A **clean BIOS dump** for this board
                            - Preferably with **EFI/iCloud lock removed**
                            - And guidance on how to **flash it using CH341A and SOIC8 clip**

                            I'd appreciate any help, links, or step-by-step instructions.
                            Thanks in advance 🙏

                            Comment

                            • Aries Molinar
                              Member
                              • Jan 2024
                              • 12
                              • Philippines

                              #94
                              Originally posted by xZINTANIx
                              **[HELP] MacBook Pro A1502 - 820-3476-A - BIOS Corrupt - Need Clean Dump**
                              Hello everyone,

                              My MacBook Pro A1502 (EMC 2875) won’t boot anymore after I attempted to remove the EFI lock and accidentally corrupted the BIOS.

                              🔧 Specs:
                              - Model: MacBook Pro Retina A1502
                              - Logic Board: 820-3476-A
                              - Serial Number: C02N655DG3QH
                              - EMC: 2875

                              I’m looking for:
                              - A **clean BIOS dump** for this board
                              - Preferably with **EFI/iCloud lock removed**
                              - And guidance on how to **flash it using CH341A and SOIC8 clip**

                              I'd appreciate any help, links, or step-by-step instructions.
                              Thanks in advance 🙏

                              Try this one
                              flash the bios using the attached bin file
                              PRAM reset 2-3x
                              Attached Files

                              Comment

                              • xZINTANIx
                                New Member
                                • Jul 2025
                                • 3
                                • Libya

                                #95
                                Hello friends i have a problem when i try to write my bios file it gives me an error Possible pretection is enabled, Press "Unprotect" and check datasheet

                                Comment

                                • Cris7p
                                  New Member
                                  • Jun 2025
                                  • 3
                                  • Ecuador

                                  #96
                                  Hello everyone.
                                  My Mac A1502, when I tried to remove the EFI, only turned on the fan, and flashing the original did the same. I thought I had damaged the BIOS memory, so I replaced it, but it's still the same; the BIOS is corrupted.
                                  I edited and flash one of the ones in the thread, and turns on, appears almost at the end of the bar loading of OSX, but it won't let me install the system.
                                  I need help.

                                  Specs
                                  MacBook Pro A1502 (820-3476-A)
                                  EMC 2875
                                  Serial C02N6HSTG3QH

                                  Comment

                                  • peste
                                    Super Moderator
                                    • Dec 2016
                                    • 12676
                                    • ROMANIA

                                    #97
                                    Originally posted by Cris7p
                                    Hello everyone.
                                    My Mac A1502, when I tried to remove the EFI, only turned on the fan, and flashing the original did the same. I thought I had damaged the BIOS memory, so I replaced it, but it's still the same; the BIOS is corrupted.
                                    I edited and flash one of the ones in the thread, and turns on, appears almost at the end of the bar loading of OSX, but it won't let me install the system.
                                    I need help.

                                    Specs
                                    MacBook Pro A1502 (820-3476-A)
                                    EMC 2875
                                    Serial C02N6HSTG3QH
                                    post the contents of the bios chip even if it is corrupted..

                                    Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:

                                    >>>>> https://www.badcaps.net/index.php?pageid=donate1 <<<<<

                                    Every donation made will go towards server fees and maintenance costs.

                                    Comment

                                    • Cris7p
                                      New Member
                                      • Jun 2025
                                      • 3
                                      • Ecuador

                                      #98
                                      Originally posted by peste

                                      post the contents of the bios chip even if it is corrupted..
                                      This is the original bios file with the efi lock.

                                      I appreciate any help
                                      Attached Files

                                      Comment

                                      • peste
                                        Super Moderator
                                        • Dec 2016
                                        • 12676
                                        • ROMANIA

                                        #99
                                        Originally posted by Cris7p

                                        This is the original bios file with the efi lock.

                                        I appreciate any help
                                        try..
                                        Attached Files
                                        Due to a lack of donations, server free space at a critical level, and possible closure of Bios Requests all donations are welcome, click:

                                        >>>>> https://www.badcaps.net/index.php?pageid=donate1 <<<<<

                                        Every donation made will go towards server fees and maintenance costs.

                                        Comment

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