ı need 820-2828-a bios dump. plase help me.
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apple imac 820-2828-a bios
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Re: apple imac bios
Hi MINE IS 100 % WORKING .If you did the steps after the flash .
Make sure to do this steps after reflash:
Resetting NVRAM
i) Shut down your Apple Mac.
ii) Locate the following keys on the keyboard: Command, Option, P, and R.
iii) Turn on your Mac.
iv) Press and hold the Command-Option-P-R keys immediately after you hear the startup sound.
v) Hold these keys until the computer restarts and you hear the startup sound for a second time.
vi) Release the keys.
And after that... reinstall the OS!
So let say your original bios work and it stop at password ...i gave you back your orignal file with out password only . You need to run the steps after so the cloud don't reset password. If you have no display you have more then just a password problem did you try a external monitor ?
Techman1025
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Re: apple imac bios
Originally posted by techman1025 View PostHi MINE IS 100 % WORKING .If you did the steps after the flash .
Make sure to do this steps after reflash:
Resetting NVRAM
i) Shut down your Apple Mac.
ii) Locate the following keys on the keyboard: Command, Option, P, and R.
iii) Turn on your Mac.
iv) Press and hold the Command-Option-P-R keys immediately after you hear the startup sound.
v) Hold these keys until the computer restarts and you hear the startup sound for a second time.
vi) Release the keys.
And after that... reinstall the OS!
So let say your original bios work and it stop at password ...i gave you back your orignal file with out password only . You need to run the steps after so the cloud don't reset password. If you have no display you have more then just a password problem did you try a external monitor ?
Techman1025
Techman1025
Comment
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Re: apple imac bios
Originally posted by killercuter View Posthow to change serial in bios imac
4.3. Apple
For 2017 and older machines, serial number is stored in Fsys store of BIOS and can be edited with hexadecimal editor. Fsys checksum needs to be fixed afterwards
Search for "ssn", edit the serial number, save, open dump in UEFITool, go to the Fsys store and write down the suggested checksum in the panel on the right. Checksum is 4 bytes at the end of the Fsys store, between one zone of 0x00 either Gaid or another zone of 0xFF, it must be written in reverse order (so last 2 characters from UEFITool must be written first).
See: https://www.youtube.com/watch?v=poA8HByYqTM
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