Running Beta 1 of Big Sur, and trying to update to Beta 2 today. The update fails to download with a generic error saying download failed, check internet connection. No network issues. I tried reinstalling the developer profile, same error. If I look at the console when the update fails, I see this... The volume can not be used because it is not snapshot booted.> Current device configuration requires an alternate installer to perform the update. NSLocalizedDescription=Current device configuration and target is invalid for install in the current state. Please try again., NSDebugDescription=[SUMacControllerErrorPreflightPrerequisiteCheckFailed=7722] Failed to perform PreflightPrerequisite operation: com.apple.MobileSoftwareUpdate.preflight.error(Preflight):MSUPreflightErrorTargetIsNotSnapshotBooted(6) | The volume can not be used because it is not snapshot booted. I tried running a disk repair and I am seeing an error while checking snapshot 2 of 2 com.apple.os.update-RANDOMGUID warning:snapshot fsroot tree corruptions are not repaired; tehy'll go away once the snapshot is deleted. These seem related, but either way, I cannot download the Beta 2 update thru software update, is there another way to download the update and install? On my other Mac, it updated with no issues.

It looks like this is new to the 10.15.4 Beta but there is a button now under Preferences>Display for "Prefer HDR Mode" . After I installed 10.15.4 Beta this week, I noticed my external monitor colors had changed, and were super vivid. Unchecking the box for Prefer HDR Mode puts the displays back to the way they were before the beta, but if my Macbook Pro goes to sleep, or I unplug/replug into my dock, the vivid colors come back, but the HDR box is not checked. Checking and then unchecking it, puts the colors back to normal.Curious if anyone else has noticed this.2017 15" Macbook Pro