Apple MacBook Pro A1502 (820-3476-A)

[lepi0101]

Re: Apple MacBook Pro A1502 (820-3476-A)

Try this one.

Hello

I need new clear bin file for
Macbook pro mid 2014
a1502 emc 2875

I've bought used macbook and when it came it was message
"Disabled, try for 60 minutes"

So please help me.

[magneh]

Re: Apple MacBook Pro A1502 (820-3476-A)

Hello all!

Got a 3476-A that turns on but shuts down 30 secs after.
Bios is corrupted.

Can someone Clean ME ?

Heres the original.

Thanks!

[peste]

Re: Apple MacBook Pro A1502 (820-3476-A)

Hello all!

Got a 3476-A that turns on but shuts down 30 secs after.
Bios is corrupted.

Can someone Clean ME ?

Heres the original.

Thanks!

what EMC ???

[magneh]

Re: Apple MacBook Pro A1502 (820-3476-A)

what EMC ???

Hey Peste!
Its A1502 (EMC 2678)

[SMDFlea]

Re: Apple MacBook Pro A1502 (820-3476-A)

Hey Peste!
Its A1502 (EMC 2678)

Try this bios https://www.badcaps.net/forum/showpo...54&postcount=5 ,edit your serial number into it first though and modify the Fsys checksum

https://www.youtube.com/watch?v=poA8HByYqTM

[reformatt]

Re: Apple MacBook Pro A1502 (820-3476-A)

Attached is the latest BIOS version for this board (V432.60.3.0.0) with Clean ME after a recent repair I did (this is from Big Sur 11.6.5). I've altered the serial number slightly so you'll need to modify this and the Fsys block checksum to use this as a donor. PRAM reset also required after installation.

[TrumanHW]

Re: Apple MacBook Pro A1502 (820-3476-A)

Attached is the latest BIOS version for this board (V432.60.3.0.0) with Clean ME after a recent repair I did (this is from Big Sur 11.6.5). I've altered the serial number slightly so you'll need to modify this and the Fsys block checksum to use this as a donor. PRAM reset also required after installation.

I know the Fsys is located at 0x590000 ...

and I have a tool that fixes it for me.

But how do you do it manually !? I used VBinDIFF and TONS of the BIN differed
to where I couldn't isolate what really mattered conveniently. Would appreciate the info if you can...

Thanks

PS,
Love this forum; they really should consider adding a "like" button
so when people do generous things for others like posting old EFIs ...
people like me can say 'thanks'.

[peste]

Re: Apple MacBook Pro A1502 (820-3476-A)

I know the Fsys is located at 0x590000 ...

and I have a tool that fixes it for me.

But how do you do it manually !? I used VBinDIFF and TONS of the BIN differed
to where I couldn't isolate what really mattered conveniently. Would appreciate the info if you can...

Thanks

PS,
Love this forum; they really should consider adding a "like" button
so when people do generous things for others like posting old EFIs ...
people like me can say 'thanks'.

https://www.badcaps.net/forum/showthread.php?t=88533

[piernov]

Re: Apple MacBook Pro A1502 (820-3476-A)

https://www.badcaps.net/forum/showpo...43&postcount=5

[TrumanHW]

Re: Apple MacBook Pro A1502 (820-3476-A)

Thanks guys, I'll go read that. (Much appreciated)

[TrumanHW]

Re: Apple MacBook Pro A1502 (820-3476-A)

AWESOME !!!! YOU GUYS ARE EFFING AWESOME !!!

I found a tool called

UEFITool ...

Which parses a BIN out as shown
(note, it will open an EFI .bin but not a T2 ROM's .bin)

Navicated to:

Intel image --> BIOS Region --> EfiSystemNvDataFvGuid --> Fsys Store

Located in the right hand pane...
Which'll tell you if the CRC32 is valid.

Terminal: CRC32 [dragged entire bin]
Results (as shown) completely wrong.

Extracted a BIN (as shown) of just the Fsys region.

Apply CRC32 to just the Fsys section (same terminal process)...
It was the same code (as shown in image) as that which was "valid".

(for others, the "h" at the end (or x0) just means the format is Hex)

[Shevy57]

Re: Apple MacBook Pro A1502 (820-3476-A)

Hey mate, this saved my life. I wish you could teach me

Try this file, I had to use this to get a Fledging SSD working on a Macbook Pro that was running 0138 EFI Bootrom.

This is EFI Bootrom revision 0151 for the 820-3476 A1502 MacBook Pro 2013/4. The ME Region is clear on it and there's no passwords set.

You must us a HEX Editor to change the serial number at block 63043B, it's currently set to 11111111111 so it will NEED to be changed.

Also, within the first few boots you will need to reset the PRAM, which is holding the P, R, ALT (Option) and CMD buttons before pressing the power button and keep holding the 4 buttons till you hear the second 'bong'. This will flush any stored passwords in the NVRAM/PRAM.

Hope this helps somebody out as much as it helped me.

[2011dandela]

Apple MacBook Pro A1502 (820-3476-A)

Please help me to reset efi code a1502 820-4924-a

[peste]

Re: Apple MacBook Pro A1502 (820-3476-A)

Please help me to reset efi code a1502 820-4924-a

the bios is corrupted.. make another copy and post again..

[2011dandela]

Re: Apple MacBook Pro A1502 (820-3476-A)

the bios is corrupted.. make another copy and post again..

I lost original dump possible try another dump

[peste]

Re: Apple MacBook Pro A1502 (820-3476-A)

I lost original dump possible try another dump

post EMC and S/N..

[2011dandela]

Re: Apple MacBook Pro A1502 (820-3476-A)

post EMC and S/N..

Model aa1502
emc2835
sn c02pv3b5fvh3
2011dandela is online now Report Post

[peste]

Re: Apple MacBook Pro A1502 (820-3476-A)

Model aa1502
emc2835
sn c02pv3b5fvh3
2011dandela is online now Report Post

try..

[2011dandela]

Re: Apple MacBook Pro A1502 (820-3476-A)

try..

think you peste itS working

iwant other dump for 1502
emc 2678
serial C02LR1NHFH00

[2011dandela]

Re: Apple MacBook Pro A1502 (820-3476-A)

try..

dump for 1502
emc 2678
serial C02LR1NHFH00