running macOS Big Sur Beta 6 on iMac 2017 and/or Mac mini 2014. installed Xcode 12 beta 6 and Apple Configurator 2.13 beta 4. when trying to restore the operating system (UniversalMac11.020A5364e_Restore.ipsw) onto the DTK I'm getting an error:
The OS cannot be restored on this device.
Failed to restore device in recovery mode, libusbrestore error:21 [com.apple.MobileDevice.MobileRestore – 0x15 (21)]
tried to restore countless times, it fails always with this error.
DTK is bricked (orange (SOS) blinking LED.
The OS cannot be restored on this device.
Failed to restore device in recovery mode, libusbrestore error:21 [com.apple.MobileDevice.MobileRestore – 0x15 (21)]
tried to restore countless times, it fails always with this error.
DTK is bricked (orange (SOS) blinking LED.