Unable to update from Big Sur beta 1(20A5299w) to Big Sur beta 9 on DTK?

I'm trying to install the latest Big Sur beta 9 on my Developer Transition Kit (DTK) so far without success after multiple attempts. Some error messages I've gotten:
  1. Software Update: When clicking on "update now," and after authentication my username, I get a consistent "download failed" message. "An error occurred while downloading the selected updates. Please check your internet connection and try again." (I've triple checked that I'm plugged into the functioning ethernet, and WiFi)

  2. I've tried to get around this by directly downloading the "Install macOS Big Sur Beta" directly from the website. (https://developer.apple.com/download/) I'm able to install the Developer Beta Access Utility successfully, and have managed to then download the installer (Install macOS Big Sur Beta), but when I try to open the file I get an error message, "This copy of the Install macOS Big Sur Beta application is damaged, and can't be used to install macOS." I've tried redownloading/restarting/etc multiple times without success.

  3. Using another computer (running Catalina) I managed to create an bootable USB drive, but I confess I'm not certain how to boot from this drive when restarting the DTK as things are different than before.

I feel a little embarrassed as a baby developer that I can't even get the beta software properly installed on my machine. If anyone can help, I'd much appreciate it. Thank you!

Best,

Tpetdoctor
Having all of the exact same issues. Maybe a restore is needed?
I'm going to give restoring a shot today--will update post as I do. ;-)
Exact same issue, and ran through the exact same steps. Got the "Install macOS Big Sur Beta" app (beta 9), but it fails when double-clicked with this alert: "This copy of the Install macOS Big Sur Beta application is damaged, and can‘t be used to install macOS."

I'd appreciate a comment from someone at Apple on how to update the DTK from 20A5299w to latest beta (currently 9), as there are all kinds of horror stories with bricked devices that I'd like to avoid (DFU modes, etc.). If there is a recommended procedure, please let us know so that we can get back to work. Thanks!

Also running Big Sur beta 1(20A5299w), also trying to update to Beta 9. Get "Download Failed. An error occurred while downloading the selected updates. Please check your internet connection and try again". [Would be great if it showed the error, wouldn't it?] Software Updates window shows "An update is available for your Mac" and shows " *macOS Big Sur Beta 9 11.0" clicking "more info" show the size is listed as 11.32GB. 100% repeatable, always fails within seconds of trying to download. I need Beta 9 because window toolbars are toast under Beta 1 and may be OK under Beta 9, and I have a lot of software to test. If anyone knows someone at Apple on the DTK team, give them a heads up that the update process of the DTK is seriously broken and is holding up progress.

Also FYI, on the left side of the Software Update screen you can see "Updates for this Mac are managed externally" with a "Details" link you can click. Doing so allows you to "Restore Defaults". Don't do it. If you do, and then try and rerun Software Updates, it tells you that your Mac is up to date and you will have to re-install the beta access utility so its scripts reset the Mac back to external update management (because, duh, your default updater only looks for released software - its the beta access that knows where to find the latest beta updates)

I took a look at the System installer log and isolated the log entries for a complete update attempt as described above. Appears to me to be a failure to find the expected update package OR a permission error. In any case, I copied my log entries from my DTK mac to a text file and have attached it.

2020-10-09 15:34:00-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: SUOSUShimController: Config data task launch successful for products: (
	)
2020-10-09 15:34:00-04 Roberts-Mac softwareupdated[458]: Adding client SUUpdateServiceClient pid=852, uid=501, installAuth=NO rights=(), transactions=0 (/System/Library/CoreServices/Software Update.app/Contents/Resources/SoftwareUpdateConfigData)
2020-10-09 15:34:00-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: Products require post-install action, skipping closing must-quit apps
2020-10-09 15:34:00-04 Roberts-Mac system_installd[494]: PackageKit: Adding client PKInstallDaemonClient pid=458, uid=200 (/System/Library/CoreServices/Software Update.app/Contents/Resources/softwareupdated)
2020-10-09 15:34:00-04 Roberts-Mac softwareupdated[458]: No keys matching () available for update
2020-10-09 15:34:00-04 Roberts-Mac softwareupdated[458]: SUUpdateSession startUpdateForProducts: inForeground: NO stageOnly: NO
2020-10-09 15:34:00-04 Roberts-Mac softwareupdated[458]: SoftwareUpdate: Added background transaction [0xc] for 
2020-10-09 15:34:00-04 Roberts-Mac softwareupdated[458]: Removing client SUUpdateServiceClient pid=852, uid=501, installAuth=YES rights=(system.install.apple-config-data), transactions=0 (/System/Library/CoreServices/Software Update.app/Contents/Resources/SoftwareUpdateConfigData)
2020-10-09 15:34:00-04 Roberts-Mac softwareupdated[458]: Stopping transaction with ID [0xc]
2020-10-09 15:34:00-04 Roberts-Mac softwareupdated[458]: SoftwareUpdate: Removed background transaction [0xc]
2020-10-09 15:34:00-04 Roberts-Mac softwareupdated[458]: Running session-idle tasks.
2020-10-09 15:34:00-04 Roberts-Mac softwareupdated[458]: Checking for inapplicable local products remaining on disk for cleanup
2020-10-09 15:34:00-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: Requesting user action: show license agreement
2020-10-09 15:34:00-04 Roberts-Mac system_installd[494]: PackageKit: Removing client PKInstallDaemonClient pid=458, uid=200 (/System/Library/CoreServices/Software Update.app/Contents/Resources/softwareupdated)
2020-10-09 15:34:00-04 Roberts-Mac system_installd[494]: PackageKit: Removing client PKInstallDaemonClient pid=458, uid=200 (/System/Library/CoreServices/Software Update.app/Contents/Resources/softwareupdated)
2020-10-09 15:34:02-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: Got response from user: 1
2020-10-09 15:34:02-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: SUOSUShimController: Updates require post-install action (restart), installing now
2020-10-09 15:34:02-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: SUOSUShimController: Download required, proceeding with confirmation and countdown notification flow
2020-10-09 15:34:02-04 Roberts-Mac softwareupdated[458]: No matching products found while calculating disk space required
2020-10-09 15:34:02-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: SUAppStoreUpdateController: disk space required for updates is: 0 ()
2020-10-09 15:34:02-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: Add space required for MSU updates. Initial space req: 0, MSU space req: 13774784512
2020-10-09 15:34:02-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: Disk already has enough free space for updates (required: 13774784512, available: 448684281856)
2020-10-09 15:34:02-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: Starting free space request (required: 13774784512, available: 448684281856)
2020-10-09 15:34:02-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: Done requesting free space from StorageManagement
2020-10-09 15:34:02-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: SUOSUShimController: Start downloading updates: (
	    "MSU_UPDATE_20A5384c_full"
	)
2020-10-09 15:34:02-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: Sending authorization to notification service
2020-10-09 15:34:02-04 Roberts-Mac SoftwareUpdateNotificationManager[457]: SUAppStoreUpdateController: authorize
2020-10-09 15:34:02-04 Roberts-Mac system_installd[494]: PackageKit: Adding client PKInstallDaemonClient pid=458, uid=200 (/System/Library/CoreServices/Software Update.app/Contents/Resources/softwareupdated)
2020-10-09 15:34:02-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: SUOSUNotificationManagerController: Added progress & completion handlers to SUMN
2020-10-09 15:34:02-04 Roberts-Mac SoftwareUpdateNotificationManager[457]: Waiting for available updates to be initially populated
2020-10-09 15:34:02-04 Roberts-Mac SoftwareUpdateNotificationManager[457]: Done waiting for available updates to be initially populated
2020-10-09 15:34:11-04 Roberts-Mac SoftwareUpdateNotificationManager[457]: Successfully evaluated local authentication policy
2020-10-09 15:34:15-04 Roberts-Mac softwareupdated[458]: SUOSUMobileSoftwareUpdateController: Download finished: Error Domain=SUMacControllerError Code=7721 "[SUMacControllerErrorPreflightWakeupFailed=7721] Failed to perform PreflightWakeup operation: [MobileSoftwareUpdateErrorDomain(MSU):MSU_ERR_INTERNAL_ERROR(7)]" UserInfo={NSLocalizedDescription=Failed to launch the software update installer. Please try again., SUMacControllerErrorIndicationsMask=0, NSDebugDescription=[SUMacControllerErrorPreflightWakeupFailed=7721] Failed to perform PreflightWakeup operation: [MobileSoftwareUpdateErrorDomain(MSU):MSU_ERR_INTERNAL_ERROR(7)], NSUnderlyingError=0x138889270 {Error Domain=MobileSoftwareUpdateErrorDomain Code=7 "No service connection" UserInfo={NSLocalizedDescription=No service connection}}}
2020-10-09 15:34:15-04 Roberts-Mac SoftwareUpdateNotificationManager[457]: SUOSUUpdateController: Download error: Error Domain=SUMacControllerError Code=7721 "[SUMacControllerErrorPreflightWakeupFailed=7721] Failed to perform PreflightWakeup operation: [MobileSoftwareUpdateErrorDomain(MSU):MSU_ERR_INTERNAL_ERROR(7)]" UserInfo={NSUnderlyingError=0x14713c710 {Error Domain=MobileSoftwareUpdateErrorDomain Code=7 "No service connection" UserInfo={NSLocalizedDescription=No service connection}}, SUMacControllerErrorIndicationsMask=0, NSDebugDescription=[SUMacControllerErrorPreflightWakeupFailed=7721] Failed to perform PreflightWakeup operation: [MobileSoftwareUpdateErrorDomain(MSU):MSU_ERR_INTERNAL_ERROR(7)], NSLocalizedDescription=Failed to launch the software update installer. Please try again.}
2020-10-09 15:34:15-04 Roberts-Mac SoftwareUpdateNotificationManager[457]: AssertionMgr: Could not cancel com.apple.SoftwareUpdateNotificationManager.RestartCountdownOperation assertion - no assertion found for pid 457
2020-10-09 15:34:15-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: SUOSUShimController: SUCCESS starting download notification service
2020-10-09 15:34:15-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: SUOSUNotificationManagerController: Invoke restart countdown download finished
2020-10-09 15:34:15-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: Error occurred during download: Error Domain=SUOSUErrorDomain Code=201 "Download failed" UserInfo={NSLocalizedRecoverySuggestion=An error occurred while downloading the selected updates. Please check your internet connection and try again., NSLocalizedDescription=Download failed, NSUnderlyingError=0x600003ecb090 {Error Domain=SUMacControllerError Code=7721 "[SUMacControllerErrorPreflightWakeupFailed=7721] Failed to perform PreflightWakeup operation: [MobileSoftwareUpdateErrorDomain(MSU):MSU_ERR_INTERNAL_ERROR(7)]" UserInfo={NSLocalizedDescription=Failed to launch the software update installer. Please try again., SUMacControllerErrorIndicationsMask=0, NSDebugDescription=[SUMacControllerErrorPreflightWakeupFailed=7721] Failed to perform PreflightWakeup operation: [MobileSoftwareUpdateErrorDomain(MSU):MSU_ERR_INTERNAL_ERROR(7)], NSUnderlyingError=0x600003ec9bf0 {Error Domain=MobileSoftwareUpdateErrorDomain Code=7 "No service connection" UserInfo={NSLocalizedDescription=No service connection}}}}}
2020-10-09 15:34:15-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: SUOSUShimController: inError: Error Domain=SUOSUErrorDomain Code=201 "Download failed" UserInfo={NSLocalizedRecoverySuggestion=An error occurred while downloading the selected updates. Please check your internet connection and try again., NSLocalizedDescription=Download failed, NSUnderlyingError=0x600003ecb090 {Error Domain=SUMacControllerError Code=7721 "[SUMacControllerErrorPreflightWakeupFailed=7721] Failed to perform PreflightWakeup operation: [MobileSoftwareUpdateErrorDomain(MSU):MSU_ERR_INTERNAL_ERROR(7)]" UserInfo={NSLocalizedDescription=Failed to launch the software update installer. Please try again., SUMacControllerErrorIndicationsMask=0, NSDebugDescription=[SUMacControllerErrorPreflightWakeupFailed=7721] Failed to perform PreflightWakeup operation: [MobileSoftwareUpdateErrorDomain(MSU):MSU_ERR_INTERNAL_ERROR(7)], NSUnderlyingError=0x600003ec9bf0 {Error Domain=MobileSoftwareUpdateErrorDomain Code=7 "No service connection" UserInfo={NSLocalizedDescription=No service connection}}}}}
2020-10-09 15:34:15-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: SUOSUNotificationManagerController: Restart countdown download complete; clearing progress and completion handlers
2020-10-09 15:34:23-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: SUOSUShimController: Start legacy scan
2020-10-09 15:34:23-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: SUOSUShimController: Start MSU scan
2020-10-09 15:34:23-04 Roberts-Mac softwareupdated[458]: SUScan: Scan for client pid 458 (/System/Library/CoreServices/Software Update.app/Contents/Resources/softwareupdated)
2020-10-09 15:34:24-04 Roberts-Mac softwareupdated[458]: Got status 200
2020-10-09 15:34:24-04 Roberts-Mac softwareupdated[458]: SUScan: Using catalog https://swscan.apple.com/content/catalogs/others/index-10.16seed-10.16-10.15-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog.gz
2020-10-09 15:34:25-04 Roberts-Mac softwareupdated[458]: SUScan: Elapsed scan time = 2.2
2020-10-09 15:34:25-04 Roberts-Mac SoftwareUpdateNotificationManager[457]: AssertionMgr: Take com.apple.softwareupdate.NotifyAgentAssertion-BadgingCountChanged assertion with type BackgroundTask for pid 457, id 0x83AA
2020-10-09 15:34:25-04 Roberts-Mac softwareupdated[458]: Refreshing available updates from scan
2020-10-09 15:34:25-04 Roberts-Mac softwareupdated[458]: SUStatisticsManager: Successfully reported statistics for category 5
2020-10-09 15:34:25-04 Roberts-Mac softwareupdated[458]: Scan (f=0, d=0) completed 
2020-10-09 15:34:25-04 Roberts-Mac softwareupdated[458]: 0 updates found:
2020-10-09 15:34:25-04 Roberts-Mac softwareupdated[458]: MSU updates found: (
	    "<SUOSUProduct: MSU_UPDATE_20A5384c_full>"
	)
2020-10-09 15:34:25-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: SUOSUShimController: Received availableUpdatesChanged notification, ignoring becase scan is in progress
2020-10-09 15:34:25-04 Roberts-Mac SoftwareUpdateNotificationManager[457]: Controller: Received availableUpdatesChanged notification; new updates: [MSU_UPDATE_20A5384c_full]; new major updates: [001-51046]
2020-10-09 15:34:25-04 Roberts-Mac softwareupdated[458]: Adding client SUUpdateServiceClient pid=457, uid=501, installAuth=NO rights=(), transactions=0 (/System/Library/PrivateFrameworks/SoftwareUpdate.framework/Versions/A/Resources/SoftwareUpdateNotificationManager.app/Contents/MacOS/SoftwareUpdateNotificationManager)
2020-10-09 15:34:25-04 Roberts-Mac softwareupdated[458]: SoftwareUpdate: request for status for unknown product MSU_UPDATE_20A5384c_full
2020-10-09 15:34:25-04 Roberts-Mac softwareupdated[458]: SoftwareUpdate: request for status for unknown product MSU_UPDATE_20A5384c_full
2020-10-09 15:34:25-04 Roberts-Mac SoftwareUpdateNotificationManager[457]: SUOSUShimController: Armed: 0, with mode: 0, date: (null), updates queued for later: (
	)
2020-10-09 15:34:25-04 Roberts-Mac SoftwareUpdateNotificationManager[457]: AssertionMgr: Cancel com.apple.softwareupdate.NotifyAgentAssertion-BadgingCountChanged assertion for pid 457, id 0x83AA
2020-10-09 15:34:25-04 Roberts-Mac softwareupdated[458]: Adding client SUUpdateServiceClient pid=457, uid=501, installAuth=NO rights=(), transactions=0 (/System/Library/PrivateFrameworks/SoftwareUpdate.framework/Versions/A/Resources/SoftwareUpdateNotificationManager.app/Contents/MacOS/SoftwareUpdateNotificationManager)
2020-10-09 15:34:25-04 Roberts-Mac softwareupdated[458]: SoftwareUpdate: request for status for unknown product MSU_UPDATE_20A5384c_full
2020-10-09 15:34:25-04 Roberts-Mac SoftwareUpdateNotificationManager[457]: AssertionMgr: Could not cancel com.apple.softwareupdate.NotifyAgentAssertion-BadgingCountChanged assertion - no assertion found for pid 457
2020-10-09 15:34:25-04 Roberts-Mac softwareupdated[458]: Adding client SUUpdateServiceClient pid=457, uid=501, installAuth=NO rights=(), transactions=0 (/System/Library/PrivateFrameworks/SoftwareUpdate.framework/Versions/A/Resources/SoftwareUpdateNotificationManager.app/Contents/MacOS/SoftwareUpdateNotificationManager)
2020-10-09 15:34:25-04 Roberts-Mac softwareupdated[458]: SoftwareUpdate: request for status for unknown product MSU_UPDATE_20A5384c_full
2020-10-09 15:34:25-04 Roberts-Mac SoftwareUpdateNotificationManager[457]: AssertionMgr: Could not cancel com.apple.softwareupdate.NotifyAgentAssertion-BadgingCountChanged assertion - no assertion found for pid 457
2020-10-09 15:34:25-04 Roberts-Mac SoftwareUpdateNotificationManager[457]: (null):softwareupdated: Service connection invalidated!
2020-10-09 15:34:25-04 Roberts-Mac SoftwareUpdateNotificationManager[457]: (null):softwareupdated: Service connection invalidated!
2020-10-09 15:34:25-04 Roberts-Mac SoftwareUpdateNotificationManager[457]: (null):softwareupdated: Service connection invalidated!
2020-10-09 15:34:25-04 Roberts-Mac softwareupdated[458]: Removing client SUUpdateServiceClient pid=457, uid=501, installAuth=NO rights=(), transactions=0 (/System/Library/PrivateFrameworks/SoftwareUpdate.framework/Versions/A/Resources/SoftwareUpdateNotificationManager.app/Contents/MacOS/SoftwareUpdateNotificationManager)
2020-10-09 15:34:25-04 Roberts-Mac softwareupdated[458]: Removing client SUUpdateServiceClient pid=457, uid=501, installAuth=NO rights=(), transactions=0 (/System/Library/PrivateFrameworks/SoftwareUpdate.framework/Versions/A/Resources/SoftwareUpdateNotificationManager.app/Contents/MacOS/SoftwareUpdateNotificationManager)
2020-10-09 15:34:25-04 Roberts-Mac softwareupdated[458]: Removing client SUUpdateServiceClient pid=457, uid=501, installAuth=NO rights=(), transactions=0 (/System/Library/PrivateFrameworks/SoftwareUpdate.framework/Versions/A/Resources/SoftwareUpdateNotificationManager.app/Contents/MacOS/SoftwareUpdateNotificationManager)
2020-10-09 15:34:25-04 Roberts-Mac SoftwareUpdateNotificationManager[457]: SUOSUShimController: MSU update is not yet downloaded & prepared
2020-10-09 15:34:25-04 Roberts-Mac softwareupdated[458]: SoftwareUpdate: request for status for unknown product MSU_UPDATE_20A5384c_full
2020-10-09 15:34:30-04 Roberts-Mac SoftwareUpdateNotificationManager[457]: AssertionMgr: Take com.apple.softwareupdate.NotifyAgentAssertion-BadgingCountChanged assertion with type BackgroundTask for pid 457, id 0x83AD
2020-10-09 15:34:30-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: SUOSUShimController: Available MSU updates: (
	    "<SUOSUProduct: MSU_UPDATE_20A5384c_full>"
	)
2020-10-09 15:34:30-04 Roberts-Mac softwareupdated[458]: MSU updates found: (
	    "<SUOSUProduct: MSU_UPDATE_20A5384c_full>"
	)
2020-10-09 15:34:30-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: Controller: Received availableUpdatesChanged notification; new updates: [MSU_UPDATE_20A5384c_full]; new major updates: [001-51046]
2020-10-09 15:34:30-04 Roberts-Mac softwareupdated[458]: Adding client SUUpdateServiceClient pid=457, uid=501, installAuth=NO rights=(), transactions=0 (/System/Library/PrivateFrameworks/SoftwareUpdate.framework/Versions/A/Resources/SoftwareUpdateNotificationManager.app/Contents/MacOS/SoftwareUpdateNotificationManager)
2020-10-09 15:34:30-04 Roberts-Mac com.apple.preferences.softwareupdate.remoteservice[749]: SUOSUShimController: Armed: 0, with mode: 0, date: (null), updates queued for later: (
	)
2020-10-09 15:34:30-04 Roberts-Mac softwareupdated[458]: SoftwareUpdate: request for status for unknown product MSU_UPDATE_20A5384c_full
2020-10-09 15:34:30-04 Roberts-Mac SoftwareUpdateNotificationManager[457]: AssertionMgr: Cancel com.apple.softwareupdate.NotifyAgentAssertion-BadgingCountChanged assertion for pid 457, id 0x83AD
2020-10-09 15:34:30-04 Roberts-Mac softwareupdated[458]: Adding client SUUpdateServiceClient pid=457, uid=501, installAuth=NO rights=(), transactions=0 (/System/Library/PrivateFrameworks/SoftwareUpdate.framework/Versions/A/Resources/SoftwareUpdateNotificationManager.app/Contents/MacOS/SoftwareUpdateNotificationManager)
2020-10-09 15:34:30-04 Roberts-Mac softwareupdated[458]: SoftwareUpdate: request for status for unknown product MSU_UPDATE_20A5384c_full
2020-10-09 15:34:30-04 Roberts-Mac SoftwareUpdateNotificationManager[457]: AssertionMgr: Could not cancel com.apple.softwareupdate.NotifyAgentAssertion-BadgingCountChanged assertion - no assertion found for pid 457
2020-10-09 15:34:30-04 Roberts-Mac SoftwareUpdateNotificationManager[457]: (null):softwareupdated: Service connection invalidated!
2020-10-09 15:34:30-04 Roberts-Mac softwareupdated[458]: Removing client SUUpdateServiceClient pid=457, uid=501, installAuth=NO rights=(), transactions=0 (/System/Library/PrivateFrameworks/SoftwareUpdate.framework/Versions/A/Resources/SoftwareUpdateNotificationManager.app/Contents/MacOS/SoftwareUpdateNotificationManager)
2020-10-09 15:34:30-04 Roberts-Mac softwareupdated[458]: Removing client SUUpdateServiceClient pid=457, uid=501, installAuth=NO rights=(), transactions=0 (/System/Library/PrivateFrameworks/SoftwareUpdate.framework/Versions/A/Resources/SoftwareUpdateNotificationManager.app/Contents/MacOS/SoftwareUpdateNotificationManager)
2020-10-09 15:34:30-04 Roberts-Mac SoftwareUpdateNotificationManager[457]: (null):softwareupdated: Service connection invalidated!



Update: I've bricked my DTK and have spent hours today trying to restore it without success. Here's what I've done:

I've tried to follow the steps outlined in "Restoring Developer Transition Kit" but have ran into several problems along the way.

When I try to restore the DTK using Apple Configurator I get one of several errors:

1) When Apple Configurator connects with the device, it asks "Apple Configurator 2 would like to update Device Support for currently connected devices. Would you like to download and install this update now? ...etc." When I click "install" after a period of time (usually a couple minutes) I get an error message, "Installation failed. Can't install the software because it is not currently available from the Software Update server." I've been able to repeat this error multiple times.

2) When I try to drag the .IPSW file from the desktop of my host desktop to the device on Apple Configurator it asks me, "Do you want to install firmware version 11.0 on "Apple Controller"? (Restore/Revive/Cancel). When I choose restore, after a period of time (several minutes) I've gotten one of several error messages:
A) "This System cannot be restored on this device. Failed to create new state machine for restore [com.apple.MobileDevice.MobileRestore - 0xFB1 (4017)]"
B) "This System cannot be restored on this device. Failed to restore device in recovery mode, libusbrestore error:21 [com.apple.MobileDevice.MobileRestore - 0X15 (21)]
C) "The System cannot be restored on this device. The operation couldn't be completed. [AMRestoreErrorDomain error 10 - Failed to handle message type StatusMsg) [AMRestoreErrorDomain - 0xA (10)]
D) "They System cannot be restored on this device. Failed to copy preflight options during recovery mode restore. [com.apple.MobileDevice.MobileRestore - 0xBBC (3004)]"
  • Note*

I note that out of desperation I tried to restore my DTK while my host Mac has been running both the latest versions of Catalina, and then even installed the latest public beta of Big Sur (11.0 Beta [20A5384c]). I get similar errors messages regardless of what operating system the host Mac is running.
  • Note* I cannot locate Apple Configurator 2.13 beta 1. However I do seem to have located a released version(Version 2.13.1 (5A35)) of this software instead. I hope that doesn't affect the process, but I'm mentioning this discrepancy in case it does have an effect. I don't know where to find an alternate version of Apple Configurator as it's not available to be downloaded (in any version) at https://developer.apple.com/download/more/ like everything else.

While I am not an experienced developer, I feel that the documentation and support from Apple has not been adequate to address this situation.

Thank you for any and all suggestions of how to proceed from here. I'm feeling quite stuck.
Has anyone managed to successfully update to beta 9? I've been trying all day on a recently received DTK. Getting similar issues with "This copy of the install macOS Big Sur Beta Application is damaged, and can't be used to install macOS."
Exactly the same error(s) here. Any solutions so far?
I'm also having this issue.

I'm guessing that one workaround might be to obtain one or more intermediate updaters to, for example, update to beta 4 first.

Does anyone know were I can get hold an installer for a previous beta version?
Just tried with beta 10, same issue.
I have the same issue with beta 10 on the DTK. Adivce appreciated.
Same issue here, no updates on this?
@tpetdoctor -- did it work? Can you post an update?
Same issue for me. After weeks, no solution and no feedback from Apple?
Exact same issue as with the original poster, from beta 1 to beta 10. Please help.
Unable to update from Big Sur beta 1(20A5299w) to Big Sur beta 9 on DTK?
 
 
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