Install Big Sur on Mac (Retina 5K, 27-inch, 2017) fails
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