APPLE A1502 emc2875, 2014-15 820-3476-A need BIOS

Discussion in 'BIOS/UEFI' started by bushmann, Jun 17, 2018.

  1. bushmann

    bushmann Well-Known Member

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    Dear all.
    Please help me, I need BIOS for Apple probook A1502 EMC 2875 2014-2015 .
    Mainboard number is 820-3475-A .
    I tried using version 2013 downloaded from here, but macbook slow startup and freezes if I install OS.

    info from BIOS file

    MBP111.88Z.0142.B00.1708080655 Copyright (c) 2005-2017 Apple Inc. All rights reserved. Apple ROM Version BIOS ID: MBP111 Built by: root@saumon Date: Tue Aug 8 06:50:20 PDT 2017
    Revision: 142~1 (B&I) Buildcave ID: 0 ROM Version: 0142_B00


    Thanks
     
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  3. technical

    technical Moderator Staff Member

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  4. bushmann

    bushmann Well-Known Member

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    So, I am try many version from this forum but any not working .
    All freezze if I start installation OS.
    This is original BIOS, but device has been remotely blocked .
    Password has been removed now.
    If now started installation OS, so system wrote this device is bllocked .
    Please you know remove this locked from this BIOS .
    Thanks
     

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  5. technical

    technical Moderator Staff Member

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    here
     

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  6. bushmann

    bushmann Well-Known Member

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    Hi .

    this version is MBP111.88Z.0138.B03.1310291227 Copyright (c) 2005-2013
    I testing this version but not working.

    I need version MBP111.88Z.0142.B00.1708080655 Copyright (c) 2005-2017
    Please, you can edit mi file from a blocked device or not.
    Another version does not work.
    I tested all files for this model, from this forum.
     
  7. technical

    technical Moderator Staff Member

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    same BIOS, only same motherboatd code. :fou: (fou)
     
  8. bushmann

    bushmann Well-Known Member

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    I have only one motherboard 820-3475-A.
    Apple used this model in production year mid2014 - mid2015.
    This information I found on internet .
    This motherboard have BIOS version MBP111.88Z.0142.B00.1708080655 .

    I tested many versions with 88Z.0138 Bxx on this motherbaoard 820-3475-A but not working .
    All version with 88Z.0138 Bxx freezes on the first screen, If I starting instalation OS from USB.
    After freezes on first screen not any more sound and reactions.

    Install on USB disk is 100% OK.
    If I used internet recovery, have same problem .

    I found on this forum only one version 88Z.0142 with password .
    When, I removed password from this version, so I'am used.
    After I running OS installation from USB drive, first screen is freeze, but on background system says "please select installation language" .
    If I using keys up and down system change language.
    But I don't see this screen, I see only first screen APPLE.
    System not komplet freeze only screen or GPU not inicialing.
    I don't know, where is problem.

    I have this problem before on another model .
    I had to use the same BIOS but with change of content.
    Any other BIOS files have same problem.

    I have one guys, what is needed changed on original BIOS file, but want moneys.
    So it I try on this forum.
     
  9. MrDarksTom

    MrDarksTom New Member

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    POR FAVOR PUEDEN QUITAR EL PASSWORD DE ESTA MACBOOK A1502 EMC 2875
     

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  10. technical

    technical Moderator Staff Member

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  11. modinside

    modinside New Member

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    please unlock this efi when installer load show a screen asking system password
     

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  12. technical

    technical Moderator Staff Member

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