The disk to which the backup was being restored must have been using MBR partition table before. Doing so causes the GPT partition table to overwrite the data on the destination drive.

Also, do note that according to this article from Apple, it might be sufficient to clone or install the system to an external GUID-partitioned disk, boot from that, and install the firmware update ...

In the next step, you need to select the partition style. It is suggested to use MBR instead of GPT or GUID Partition Table. After clicking the OK button, your disk should initialize and run ...

What does GUID partition table actually mean? Find out inside PCMag's comprehensive tech and computer-related encyclopedia.

The scheme defines the overall organization of the drive, which can feel pretty obscure, because you rarely need to change it. You can select among GUID Partition Map, Master Boot Partition, and ...

Now with a little bit of searching I've found a Windows based tool that claims it can recover a GUID partition table called Partition Guru Professional Edition (the free version does not handle ...