I don't know what happened but the backup file of the BIOS is gone and I already erased the chip, now with a new dump it loads but stuck before login.
What is my possibilities here?
What is my possibilities here?
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Re: Macbook Air, EFI locked .bin backup is gone, what to do?
you can start from your serial number from back cover...
after that you can go to
https://everymac.com/ultimate-mac-lookup/
get your detail from there...
now you can compare your bios with the detail you got..
better post your new dump here and your serialnumber+mainboard code,
someone can help here...Last edited by rioreno; 10-21-2017, 12:52 PM. -
Re: Macbook Air, EFI locked .bin backup is gone, what to do?
I tried with the sn of the machine I added it to the line after ssn but no luck..is the serial number that in the .bin file is the same as the machine serial number?? I was sure it is a different SN..maybe the location I added it is wrong? New to the EFI flashingComment
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Re: Macbook Air, EFI locked .bin backup is gone, what to do?
I can't upload the .bin file to here but its a file which I downloaded from ghostlyH by the EMC and the specifications of the computer so it should be just fine.
This is the SN from the bottom case: C02MV7FUG085 and this is the SN on board: C0242340CV9FY5CAP
Not sure how am i suppose to upload the dump since the site don't accept .bin files..Last edited by davis12; 10-22-2017, 06:13 AM.Comment
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Re: Macbook Air, EFI locked .bin backup is gone, what to do?
zip it and uploadComment
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Hi everyone!
I have a 2018 MacBook Pro (with Sequoia OS) that I've been using for years with no problem. I recently received an M2 MacBook Pro so I'm mostly using it and not the 2018 one, but since a friend of mine needs a computer, I thought I could restore my 2018 and give it brand-new-like to my friend.
I tried using the built-in tool to restore the MacBook (Settings > General > Transfer or restore > Delete) but it got stuck when trying to remove the Find Device configuration (it asked me for the password for my old Apple ID -now I use the same account but...06-27-2025, 08:54 AM -
Hi,
I received a 2018 MacBook Pro A1990 for repair, and the motherboard was replaced, presumably purchased on AliExpress. The motherboard's activation is blocked because the previous owner didn't delete it. Does anyone have a solution to this problem? I called Apple, and as expected, they asked me to activate the process with proof of purchase for the original computer, which I find very difficult, so the proof of purchase from AliExpress will be of little use. Any suggestions? Thanks. -
I have a 2020 Macbook Pro A2289 and after many attempts managed to get it into DFU mode, using my older 2017 A1706 Macbook Pro (Running Ventura 13.7.8). However, when attempting 'Restore', it fails at step 4 of 4, showing the following error:
- "The operation couldn’t be completed. (AMRestoreErrorDomain error -1 - Failed to handle message type StatusMsg (Generic error)) [AMRestoreErrorDomain – 0xA (10)]
- "The system cannot be restored on this device. Failed to create new state machine for restore [com.apple.MobileDevice.MobileRestore - 0xFB1 (4017)]
...08-30-2025, 10:27 AM -
I have a liquid damaged 820-02016 that has a 1-2mm wide hole in the PCB caused by a burned capacitor. The PPBUS_VON is shorted. I think the board is 100% gone, I tried grinding off the burned PCB material with no avail, the board is burned almost through to the other side.
But, I can get a fully working iCloud locked mainboard for very cheap.
As far as I have seen, there are only two ROM chips on the board, the TBT ROM and main flash.
Is it possible to transfer these two ROMs from the bad board to the good locked one and "unlock" the good... -
1. RESET MACOS WITH IPSW
a. Power off MacBook, press and hold the power button to enter Recovery
b. Open Disk Utility, remove Macintosh HD
c. Reboot, connect to the network to Activate Mac.
d. Plug the C cord in the first port of the MacBook into the other Mac, then power off the MacBook
d. Hold down the Control (L) + Option (L) + Shift (R) + Power key combination for 10 seconds
e. Release the other keys, but keep holding the Power key for another 10 seconds
f. MacBook is returned to DFU, open Apple Configurator 2 on the other Mac, right-click...
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