Yesterday I did the OTA update with almost same result on my Opencore mac pro 5,1 spoofing a iMac Pro 1,1. However the OpenCanopy boot screen selector shows Big Sur as “Preboot”. Whereas in beta 2 it showed as the SSD’s name.Yes, that works.
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Once click the "More info..." it will download the 4.96GB incremental update image, but not the full 12.88GB full update image.
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And it seems this more like the iOS OTA update. It has pretty long preparation time.
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it appears to be seeing only the “Preboot”. Selecting this it boots to Big Sur beta 3 and seems to function as expected.
Any suggestions? before I reinstall with the full installer which I also downloaded.
Thanks