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This actually did a full re-install of beta 6 (20A5364e), since I believe you need to update to beta 7 from beta 6 and can’t do a full install. So, I went to and re-downloaded the beta from there (while in safe mode).
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I tried rebooting (not in safe mode) and the issue persisted.
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I ran a full disk utility in Safe Mode, my computer said it was a success. No issue here at all! Great, however, the computer would only work in Safe Mode. MBP wouldn't restart, same issue (getting ¾ through and then freezing + fan). Did this for *hours* until I cut my losses (I have a pretty recent backup) and held down the power button and shut the computer off. Install was going fine, until, when my MacBookPro was restarting, about ¾ through the start-up bar the computer froze and the fan started going crazy. So, when macOS Big Sur beta 7 (20A5374g) released last week, I installed it (from beta 6).
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