Still can’t install Big Sur
Trying to install Big Sur on a supported iMac. Download the installer from Software Update: Check. Install the OS: Check. Then the Mac restarts, shows the Apple logo and a progress bar, and after 2 minutes... restarts. And after 2 minutes: Restarts.
I’ve now downloaded the installer four times; I’ve run the installer from Safe mode; I’ve checked the Fusion Drive integrity several times using Hard Disk Toolkit’s First Aid and with Onyx. I’ve checked if the correct startup disk is used using the alt key during restart and choosing the installer partition. It Just Won’t Work. Every time I have to go back to Catalina using cmd-R during restart. This is getting weird. What can I do? Thanks!
iMac 27″, macOS 10.15