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critical software update error

  1. Vento

    Can't install MacOS, always fails. So: how to install MacOS from another Mac, via a cable?

    Hi. I am a newbie to Macs. I've got a Macbook Air 2017, and it will not install any OS - it gets so far and then says "An error occurred preparing the software update". Long story short - I've tried erasing the HD, doing First Aid, using internet recovery, trying a USB stick, using different and...
    • Vento
    • Thread
    • critical software update error error occurred installation failure macbook air 2017 usb 3 drive
    • Replies: 16
    • Forum: macOS
  2. shafiq700999

    A1706 820-00923 Critical Software required Stuck

    Hi Friends, I have 820-00923 need critical software update stuck Logic board issue. i.e 1.88V not present on R4400 & R4490. any one any idea may it is T1 issue or something else.
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