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EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

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    EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

    Hi all, I need the CLEAN original EFI BIN File for the MacBook Air A1466 (EMC 2632) 820-3437-B ... Thanks in advance

    #2
    Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

    Better post your original dump and tell what the issue is with it.
    OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

    Comment


      #3
      Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

      Thanks., Cannot even read the BIOS Chip., its totally dead & in the BIOS Writer/reader it say no chip detected (NO CHIP FOUND). tried other chips & all works fine on this reader.

      Comment


        #4
        Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

        Serial number has to be edited and Fsys checksum corrected accordingly.
        Attached Files
        OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

        Comment


          #5
          Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

          Thank you very much... This is the first time I am going to program this BIOS. Just to verify & ask you that Serial number has to be edited and Fsys checksum in the HEX Editor?

          Comment


            #6
            Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

            Originally posted by mferna14 View Post
            Thank you very much... This is the first time I am going to program this BIOS. Just to verify & ask you that Serial number has to be edited and Fsys checksum in the HEX Editor?
            Yes it does. check this useful youtube video https://www.youtube.com/watch?v=poA8HByYqTM
            All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

            Comment


              #7
              Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

              Very good knowledge youtube video for me & other too. Thank you very much

              Comment


                #8
                Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

                Very helpful & great youtube video presentation. Appreciate & thank you very much for making me understand....

                Comment


                  #9
                  Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

                  Hi, I'm new on the forum.

                  Me too I'm fighting with MacBook Air Early 2014 bricked by Catalina upgrade (screen totally black, key combinations do not work).

                  I bought CH431A programmer and I build my own connector (very micro-solding challenge).

                  @mferna14
                  Did you try doing as https://youtu.be/Y7l6X51LQk4?t=124 ?
                  With this trick I'm able to detect the chip.

                  @piernov
                  I downloaded the firmware you posted (thanks for that).

                  Code:
                  strings 820-3437-10.15-clean.bin | grep EFI
                   EFI Version: 117.0.0.0.0
                  Here
                  https://eclecticlight.co/2019/10/08/...ing-version-4/
                  i read that the Catalina firmware should be 118.0.0.0.0 and here
                  https://eclecticlight.co/2018/10/31/...ing-version-3/
                  i read that 117.0.0.0.0 should be the last Mojave firmware.

                  Could you confirm that the binary you posted is from a working full-updated Catalina system?

                  I have also other questions for you, in order to solve my problem. Do I have to open new thread or I can continue on this one?

                  Thankyou,
                  Mapiro

                  Comment


                    #10
                    Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

                    A yeah it was from a Catalina beta, dated from the 11 august 2019 on my end, so it may not be the latest version, however it has APFS support at least. But it's from a working system.
                    You can at least flash it and try again the upgrade to Catalina, it's not supposed to fail every time.

                    If your issue is not related to EFI/BIOS then yes please open another thread (outside the BIOS section).
                    OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

                    Comment


                      #11
                      Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

                      Thankyou piernov.
                      (BTW: I really liked your mac-videos on YouTube, after seeing them I searched for your contact to to ask you some questions, without success. By chance, I found you in this forum! ).

                      My CH341A detects the EFI chip only if I do as in the video I posted: internal battery disconnected, external power connected and then PC powered down by pressing power button.

                      This way I can read EFI more times, getting identical dumps, until I unplug the external power.

                      If I unplug and replug the external power, power off the mac pressing power button and finally try to read again the EFI, I get a EFI dump that is different from previous. The differences are not single sparse byptes, they seem to be in blocks. It seems that the differeces are around 1% of tytes.

                      Next reads are always identical.

                      1)
                      Is it normal? Each dump I have could be considered a "good" backup (ignoring the fact that the current firmware is bricked)?

                      2)
                      Could the EFI be in a infinite loop of attempts to complete a faulty internal-update-procedure ? (the mac died during Catalina update).

                      Mapiro

                      Comment


                        #12
                        Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B
                        • FW downloaded
                        • Serial changed
                        • Flashing...
                        • Power reset -> Mac back to life!
                        • Reinstall -> Catalina update -> All is fine!


                        The "not last version" of the wirmware was an unexpected benefit because now I can see that Catalina updated again the firmware with the very-last release (118)

                        Thankyou very much for the support.
                        Mapiro

                        Comment


                          #13
                          Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

                          hi gays who can clear me this bin for macbookair 820-3437-A
                          Attached Files

                          Comment


                            #14
                            Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

                            Originally posted by Perovski View Post
                            hi gays who can clear me this bin for macbookair 820-3437-A
                            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


                              #15
                              Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

                              thinks pest for your help ui test and reply

                              Comment


                                #16
                                Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

                                Hi friend I have my macbook air dump bios bin file ..it starts but no display
                                i think is a bios issue please can u help me if there is a problem with the dump??
                                Attached Files

                                Comment


                                  #17
                                  Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

                                  Originally posted by elbtonet View Post
                                  Hi friend I have my macbook air dump bios bin file ..it starts but no display
                                  i think is a bios issue please can u help me if there is a problem with the dump??
                                  the posted bios is not ok ... try this ..
                                  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


                                    #18
                                    Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

                                    hi pest i pupload your dump and now dead machine thinks any way have you other solution

                                    Comment


                                      #19
                                      Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

                                      Originally posted by Perovski View Post
                                      hi pest i pupload your dump and now dead machine thinks any way have you other solution
                                      try post # 4 ..
                                      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


                                        #20
                                        Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

                                        Originally posted by piernov View Post
                                        Serial number has to be edited and Fsys checksum corrected accordingly.
                                        Done that and got my mac back on track!

                                        Thanks mate! you've made a new suscriber to your chanel

                                        Comment

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