2019 iMac 21.5''

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  • kinano
    New Member
    • Jun 2020
    • 3
    • USA

    #1

    2019 iMac 21.5''

    Sup guys, i recently purchased an imac from ebay that was supposed to work but the seller scammed me and sold me a mac that was firmware locked. 2 months of headaches and learning, i was able to get the bios chip out without damaging the computer . Is this firmware impossible to bypass, and if not, how can i clean it so that the firmware password gets removed?
    Attached Files
  • SMDFlea
    Super Moderator
    • Jan 2018
    • 21022
    • UK

    #2
    Re: 2019 iMac 21.5''

    Open the bios with a hex editor and search for $SVS ,then fill the region you select with FF`s . There are lots of videos on youtube showing how its done https://www.youtube.com/watch?v=KCl6Iu8fSSI

    .
    Last edited by SMDFlea; 08-02-2020, 06:57 AM.
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    Comment

    • MobileXT
      Badcaps Veteran
      • Oct 2012
      • 200
      • USA

      #3
      Re: 2019 iMac 21.5''

      Please see attached clean. Re-program the bin file to the EFI chip and PRAM at the first start.
      Attached Files

      Comment

      • kinano
        New Member
        • Jun 2020
        • 3
        • USA

        #4
        Re: 2019 iMac 21.5''

        Originally posted by MobileXT
        Please see attached clean. Re-program the bin file to the EFI chip and PRAM at the first start.
        Thank you, i will give it a try!

        Comment

        • multitech
          New Member
          • Jul 2020
          • 6
          • Portugal

          #5
          Re: 2019 iMac 21.5''

          Hey Guys, i have a 2019 iMac 21.5'' after flash the unlocked bios i cannot startup the OS X but i tried install Windows and worked well, any tips? thank you.
          Attached Files

          Comment

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