Big Sur Upgrade Error – An error occurred preparing the software update. Reinstalling macOS Big Sur on Apple Silicon – Slowness after upgrade to Big Sur – Other have reported that their Mac is very slow after upgrading to Big Sur. – Some users are reporting after a good install the Mac is stuck in an endless boot loop. Big Sur Install failing and bricking some older 13″ MBPro’s – Installation fails and the Mac has a black screen – Will not respond to any startup commands. Big Sur progress gets stuck mid installation – Black Screen with Apple Logo stuck or stopped progress bar Big Sur Full Installer.app Download Problems – “Installation Failed Error Occurred while installing the selected updates.” UPDATED 2/14/21 – List of macOS Big Sur Installation Issues.
macOS Big Sur Install Issues Table of Contents Macintosh video that goes over some of the known Big Sur Install issues.
