mickeyd453 29 Posted November 2, 2020 Posted November 2, 2020 I am trying to upgrade from a running Catalina to BigSur and encounter the following error. My machine is enrolled in the beta program and the installer is downloaded from system preferences. I am running on Clover 5126 with an iMac 16,1 SMBios. I have deleted and downloaded the installer many times. Any thoughts on how to debug? Share this post Link to post Share on other sites
spakk 1,839 Posted November 2, 2020 Posted November 2, 2020 this has already been described here several times, please read here. Share this post Link to post Share on other sites
mickeyd453 29 Posted November 9, 2020 Posted November 9, 2020 Edit - Success! BigSur running on my trusty Otiplex 980. Upgrade to latest beta went perfect via software update. Share this post Link to post Share on other sites
