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Does someone has a solution? The install ask to reboot, when rebooting after 2-3 minutes the progress bar stops and the system restarts. This is coming into a loop where only a recovery of the previous Catalina version seems the remaining solution.
Even with removing all data from the harddisk and reinstalling from scratch Catalina, the upgrade to Big Sur fails.
Any suggestions?
iMac 27″ 5K, macOS 10.15
You can save you and us a lot of time and effort if you do the following:
Please navigate to the Mac App Store or navigate to www.Etrecheck.com and download the free version of EtreCheck. Once you have you downloaded the app and installed it, please run the report and save it. This report will help us get a good idea what has been installed on your system and help us be able to diagnose what may be wrong.
When you have your report, you can attach it when you reply to this message and we can then review it and help you determine what is needed to get your system running well again.
For instructions on how to download your EtreCheck report and attach it to your reply to this message please click https://discussions.apple.com/docs/DOC-250000211
Install Big Sur on Mac (Retina 5K, 27-inch, 2017) fails
