He managed to recover all of my data onto an external 2Tb Toshiba drive (thank goodness) BUT he tried to reinstall Big Sur with no luck either. On Monday, I took my iMac to a repairer who did an excellent job in updating my iMac with a Samsung 2Tb SSD drive and maxed out my RAM.
The bottom line is that having spent around 10 hours trying to reinstall big sur I kept getting the message 'application denied'. I contact 4 apple support people who were helpful, we went through diagnostics, recovery etc etc. I tried over and over again to reboot with no luck. On rebooting it progressed to around 50% and stopped.
Last Saturday my 2017 iMac 4k retina, crashed using the lasted Big Sur update. Can anyone offer help and guidance please?
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