MacOS – iMac stuck since update

big surmacmacosmojave

I'm on an IMac mid 2017
I tried to update my Mac running under Mojave to Big Sur. I got an error that the disk check couldn't be done.
Since if I boot the mac in normal mode I can't start it, it gets stuck on the apple logo.
So I wanted to reset the mac but when I open the disk utility via Mac Restore it loads endlessly and doesn't display the disks.

I count on this precious community to help me.
Thank you for your time

Best Answer

There’s only two things to do.

  1. Connect this Mac to another in target disk mode and use a second Mac to erase / test the storage.
  2. Boot to internet recovery and follow the precise exact steps. If you select the wrong part of a disk or the wrong image, the erase will fail.
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