Hi all, I need the CLEAN original EFI BIN File for the MacBook Air A1466 (EMC 2632) 820-3437-B ... Thanks in advance
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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 -
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
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Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B
Serial number has to be edited and Fsys checksum corrected accordingly.OpenBoardView — https://github.com/OpenBoardView/OpenBoardViewComment
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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
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Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B
Yes it does. check this useful youtube video
https://www.youtube.com/watch?v=poA8HByYqTM
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Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B
Very good knowledge youtube video for me & other too. Thank you very muchComment
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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
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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).
HereCode:strings 820-3437-10.15-clean.bin | grep EFI EFI Version: 117.0.0.0.0
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,
MapiroComment
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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/OpenBoardViewComment
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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).
MapiroComment
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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.
MapiroComment
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Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B
hi gays who can clear me this bin for macbookair 820-3437-AComment
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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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Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B
thinks pest for your help ui test and replyComment
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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??Comment
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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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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 solutionComment
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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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I received a 2013 Macbook Air A1466 820-3437-B motherboard with serial number C02L6GQ9FSV8 that came in WITHOUT a bios chip. I got a new bios chip and reprogrammed it. Macbook now powers on but doesn't boot the SSD. I've flashed a ton of bios but still same problem. Windows installation works with this Macbook but never a mac installation. Unfortunately, since I didn't receive this macbook with a bios chip, I don't have the original bios. What can I do now?... -
Hello all,
Working on my wife's 13' Macbook air. It's been in a box since she upgraded but I figured it could be good practice.
Details:
Macbook 13' A1466
Board (820-3209-A)
Battery OEM 7.3v 50Wh 6700 mAh (020-7379-A)
Pictures below of Boardview and schematic...
I don't know how to test the voltage on a MacBook battery. I just assumed it had an enable pin but the best I could read was 300 something mV poking around the battery connector.
It's an older model and it is very likely that battery has become... -
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TSB4232(256)
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Thanks -
Hi all,
i got a A1466 with serious water damage. I was able to clean the whole board and only found a fuse with a coroded trace. Cleaning and resoldering did the job and the macbook started normal but after some time the screen began "flashing" like turning on and off while the Macbook was still running. I checked the board again but was not able to find the problem until now.
Any ideas where to look?... -
Hi. Recently serviced a damaged A1466 Macbook Air. Thought to post the issues and resolution for each.
Macbook AIR Model A1466 Diagnostic 09-01-2021
Issue: Liquid damaged (beer spill) Macbook AIR will not power up.
Problems & Resolutions
1) Attached Apple magsafe power adapter. No green / no orange light. This confirms the absence of the PP3V42_G3H voltage rail. The PP3V42_G3H rail is the primary voltage rail necessary to communicate with the magsafe power adapter to report the green or orange light status to the end user....09-01-2021, 09:31 AM
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