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-   -   EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B (https://www.badcaps.net/forum/showthread.php?t=80603)

mferna14 11-08-2019 01:13 PM

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

piernov 11-08-2019 02:25 PM

Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B
 
Better post your original dump and tell what the issue is with it.

mferna14 11-08-2019 05:11 PM

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.

piernov 11-10-2019 07:46 AM

Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B
 
1 Attachment(s)
Serial number has to be edited and Fsys checksum corrected accordingly.

mferna14 11-15-2019 06:23 PM

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?

SMDFlea 11-16-2019 01:49 AM

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

Originally Posted by mferna14 (Post 925749)
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 :D https://www.youtube.com/watch?v=poA8HByYqTM

mferna14 11-16-2019 12:52 PM

Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B
 
Very good knowledge youtube video for me & other too. Thank you very much

mferna14 11-16-2019 01:02 PM

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....

Mapiro 12-12-2019 06:10 AM

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

piernov 12-12-2019 06:49 AM

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).

Mapiro 12-12-2019 07:40 AM

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

Mapiro 12-16-2019 05:23 AM

Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B
 
  • FW downloaded
  • Serial changed
  • Flashing...
  • Power reset -> Mac back to life! :rock:
  • 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

Perovski 01-22-2021 10:31 AM

Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B
 
1 Attachment(s)
hi gays who can clear me this bin for macbookair 820-3437-A

peste 01-22-2021 10:39 AM

Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B
 
1 Attachment(s)
Quote:

Originally Posted by Perovski (Post 1017387)
hi gays who can clear me this bin for macbookair 820-3437-A

try..

Perovski 01-23-2021 01:50 AM

Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B
 
thinks pest for your help ui test and reply

elbtonet 01-25-2021 05:54 AM

Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B
 
1 Attachment(s)
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??

peste 01-25-2021 06:27 AM

Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B
 
1 Attachment(s)
Quote:

Originally Posted by elbtonet (Post 1018206)
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 ..

Perovski 01-26-2021 05:48 AM

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

peste 01-26-2021 06:29 AM

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

Originally Posted by Perovski (Post 1018508)
hi pest i pupload your dump and now dead machine thinks any way have you other solution

try post # 4 ..

alterr333 02-20-2021 10:33 AM

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

Originally Posted by piernov (Post 924801)
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


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