iMac 2015 stuck on “Less than a minute remaining” after trying to download macOS Big Sur
Tried to install macOS Big Sur on my iMac, been stuck on the less than a minute screen for about 2 hours. Tried everything I could find online about rebooting into safe mode (didn’t work), solutions others had found (none of the ones I tried worked), so I’m stuck. I don’t want to factory reset as it would lose too many important/sentimental files. Has anyone found a solution to this, or is the computer broken?
iMac 27″, macOS 10.13