a1502 gone bad... please help me

Hi there
using pi2 and Rebel Easy Mac Book Pro / Air Flasher 2010-2014 from rebelsimcard.com

Dumped the efi code 3 times and compared them with md5, no problemer here.

Things started to go very wrong when earsing the chip...

I am not able to do anything now, no light in charger and no spinning fan

any advice would be great!!!

To all who read, I cannot stress enough to avoid using the pi with 2015+ Macs.

Numerous tests have resulted in failure and bricked Macs.

I have a dump which I pulled from an a1502 efi chip while removed from the machine.

If anybody needs it PM me.

Currently the only safe way seems to program out of circuit.

how are you doing on this a1502?

rereading the OP, i see you're not dealing with a 2015 MacBook.

is there a copy of your EFI in the repo?

i been learning to fix circuits watching louis rossmann on youtube
and the mbook air 2012 2559 i had been making backup of chip and died but fans work normal with right firmware and wrong fan speeds with wrong

then i found a wet spot on the LCD backlight driver chip!

another common is a few resistors going bad on the ic charging chip.. $4 parts

i ordered these chips and got me hot air station and currently in process of fix this week.

good! practice practice practice. get some old PC motherboards or better yet, cheap electronic devices. take them apart and put them back together.

it's FAR better to destroy something that's worth nothing when learning

Hi,

I have a early 2015 MBA A1466 EMC 2925. Can anyone help getting the EFI unlock/reset?


Thank you,

Sure we can help, but you've got to come a little more specific than that!

My apologies, let me try this again.

I do have an easy flasher 4.03 and tried reading the flash with the Pi. But the MD5SUM doesn't match on all the reads. What other options do I have to get the EFI password reset. The macbook air boots up and goes to the flashing folder icon. Any attempt to boot to recovery or option gets the padlock icon. I'm new to flashing EFI. Not sure what options I have. Send in the MBA to have it password remoe or possibly try the EFiDL?

Thank you

i blame the inconsistent reads on power.

try booting the mac to the [?] screen and connecting the pi w/o VCC and reading. or try booted to the padlock and reading.

you'll need to find a state where the EFI chip is powered internally, but not locked.

or you can send it in!

Thanks Rev,

I tried the suggestions above, but all the readings are still not matching the MD5SUM. Weird thing, I replaced the SSD from another MBA and it goes to the folder icon. But while attempting to do a reading, it booted to the new replaced SSD. Not sure what happened, but its booting to the OS on the different SSD. Any attempt to boot to other media or recovery brings up the padlock. I'm able to use the MBA now, so its that just the firmware password, thats locked? I should be good to use it without it being lock out of the OS again? But I do not have the option to boot to recovery or another other media type?

Thanks,

It sounds like you are lucky enough to have ONLY an EFI lock and not an iCloud lock. You should be fine to use, just sign into your own iCloud.

Download and install rEFInd, it's an EFI bootloader.

once that's installed, it will give you a pre-OS X boot selection screen which you can use to launch single-user mode. From single user mode you can clear the nvram and remove the EFI lock (-:

For instructions on rEFInd:

ghostlyhaks.com/forum/password-cracking/570-tutorial-for-brute-forcing-modern-macs