Badcaps.net Forum
Go Back   Badcaps Forums > Troubleshooting Hardware & Devices and Electronics Theory > Troubleshooting Laptops, Tablets, and Mobile Devices > BIOS Requests ONLY!
Register FAQ Calendar Search Today's Posts Mark Forums Read

 
Thread Tools Display Modes
Old 11-08-2019, 01:13 PM   #1
mferna14
Badcaps Veteran
 
Join Date: Jun 2018
City & State: Brampton
My Country: Canada
I'm a: Knowledge Seeker
Posts: 491
Default 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
mferna14 is offline   Reply With Quote
Old 11-08-2019, 02:25 PM   #2
piernov
Super Moderator
 
Join Date: Jan 2016
City & State: Valbonne, 06
My Country: France
I'm a: Knowledge Seeker
Posts: 3,682
Default 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
piernov is offline   Reply With Quote
Old 11-08-2019, 05:11 PM   #3
mferna14
Badcaps Veteran
 
Join Date: Jun 2018
City & State: Brampton
My Country: Canada
I'm a: Knowledge Seeker
Posts: 491
Default 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.
mferna14 is offline   Reply With Quote
Old 11-10-2019, 07:46 AM   #4
piernov
Super Moderator
 
Join Date: Jan 2016
City & State: Valbonne, 06
My Country: France
I'm a: Knowledge Seeker
Posts: 3,682
Default Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

Serial number has to be edited and Fsys checksum corrected accordingly.
Attached Files
File Type: zip 820-3437-10.15-clean.bin.zip (4.20 MB, 1548 views)
piernov is offline   Reply With Quote
Old 11-15-2019, 06:23 PM   #5
mferna14
Badcaps Veteran
 
Join Date: Jun 2018
City & State: Brampton
My Country: Canada
I'm a: Knowledge Seeker
Posts: 491
Default 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?
mferna14 is offline   Reply With Quote
Old 11-16-2019, 01:49 AM   #6
SMDFlea
Super Moderator
 
Join Date: Jan 2018
City & State: York
My Country: UK
I'm a: Knowledge Seeker
Posts: 10,744
Default Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

Quote:
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
SMDFlea is offline   Reply With Quote
Old 11-16-2019, 12:52 PM   #7
mferna14
Badcaps Veteran
 
Join Date: Jun 2018
City & State: Brampton
My Country: Canada
I'm a: Knowledge Seeker
Posts: 491
Default 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 is offline   Reply With Quote
Old 11-16-2019, 01:02 PM   #8
mferna14
Badcaps Veteran
 
Join Date: Jun 2018
City & State: Brampton
My Country: Canada
I'm a: Knowledge Seeker
Posts: 491
Default 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....
mferna14 is offline   Reply With Quote
Old 12-12-2019, 06:10 AM   #9
Mapiro
New Member
 
Join Date: Dec 2019
City & State: Milan
My Country: Italy
I'm a: Knowledge Seeker
Posts: 4
Default 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
Mapiro is offline   Reply With Quote
Old 12-12-2019, 06:49 AM   #10
piernov
Super Moderator
 
Join Date: Jan 2016
City & State: Valbonne, 06
My Country: France
I'm a: Knowledge Seeker
Posts: 3,682
Default 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).
piernov is offline   Reply With Quote
Old 12-12-2019, 07:40 AM   #11
Mapiro
New Member
 
Join Date: Dec 2019
City & State: Milan
My Country: Italy
I'm a: Knowledge Seeker
Posts: 4
Default 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 is offline   Reply With Quote
Old 12-16-2019, 05:23 AM   #12
Mapiro
New Member
 
Join Date: Dec 2019
City & State: Milan
My Country: Italy
I'm a: Knowledge Seeker
Posts: 4
Default 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
Mapiro is offline   Reply With Quote
Old 01-22-2021, 10:31 AM   #13
Perovski
New Member
 
Join Date: Jul 2016
City & State: Tunisia
My Country: Tunis
I'm a: Knowledge Seeker
Posts: 7
Default 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
File Type: rar 820-3437 a blocked .rar (3.99 MB, 79 views)
Perovski is offline   Reply With Quote
Old 01-22-2021, 10:39 AM   #14
peste
Badcaps Veteran
 
Join Date: Dec 2016
City & State: CAMPINA
My Country: ROMANIA
I'm a: Knowledge Seeker
Posts: 6,240
Default Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

Quote:
Originally Posted by Perovski View Post
hi gays who can clear me this bin for macbookair 820-3437-A
try..
Attached Files
File Type: rar 9.5.3.1526_outimage.rar (3.88 MB, 149 views)
peste is offline   Reply With Quote
Old 01-23-2021, 01:50 AM   #15
Perovski
New Member
 
Join Date: Jul 2016
City & State: Tunisia
My Country: Tunis
I'm a: Knowledge Seeker
Posts: 7
Default Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

thinks pest for your help ui test and reply
Perovski is offline   Reply With Quote
Old 01-25-2021, 05:54 AM   #16
elbtonet
Member
 
Join Date: Nov 2019
City & State: albania
My Country: albania
I'm a: Knowledge Seeker
Posts: 50
Default 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
File Type: rar A1466.rar (3.94 MB, 55 views)
elbtonet is offline   Reply With Quote
Old 01-25-2021, 06:27 AM   #17
peste
Badcaps Veteran
 
Join Date: Dec 2016
City & State: CAMPINA
My Country: ROMANIA
I'm a: Knowledge Seeker
Posts: 6,240
Default Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

Quote:
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
File Type: rar a1466+9.5.3.1526+outimage.rar (3.88 MB, 231 views)
peste is offline   Reply With Quote
Old 01-26-2021, 05:48 AM   #18
Perovski
New Member
 
Join Date: Jul 2016
City & State: Tunisia
My Country: Tunis
I'm a: Knowledge Seeker
Posts: 7
Default 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
Perovski is offline   Reply With Quote
Old 01-26-2021, 06:29 AM   #19
peste
Badcaps Veteran
 
Join Date: Dec 2016
City & State: CAMPINA
My Country: ROMANIA
I'm a: Knowledge Seeker
Posts: 6,240
Default Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

Quote:
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 ..
peste is offline   Reply With Quote
Old 02-20-2021, 10:33 AM   #20
alterr333
Member
 
Join Date: May 2019
City & State: Playa del carmen
My Country: México
Line Voltage: 120vac 60hz
I'm a: Knowledge Seeker
Posts: 27
Default Re: EFIBIN File MacBook Air A1466 (EMC 2632) 820-3437-B

Quote:
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
alterr333 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Badcaps.net Technical Forums © 2003 - 2022
Powered by vBulletin ®
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
All times are GMT -6. The time now is 08:39 PM.
Did you find this forum helpful?