![]() Usually, when I do this, it shows the boot-order screen, and it shows Macintosh HD and Recovery, along with the Windows and EFI Boot partition.NOW, however, the Macintosh HD and Recovery drives do not show up, and I fear that I may have accidentally formatted the ENTIRE drive. ![]() Afterwards, just to check if it still worked, I restarted the iMac and pressed Alt. I researched this and thought I had found a fix by formatting the Bootcamp partition, and I had done so. ![]() It gave me the error that the disk format for the BOOTCAMP drive was MBR but Windows could only be installed on GPT disks. IMac 27-inch Late 2012 - Deleted everything by accident: Mac partition AND recovery Hello all,I was trying to install Bootcamp on my iMac 27inch Late 2012, and everything was successful until I got to the Windows Installation Setup after restarting the computer. And I find similar discussions are too complex to apply to my situation.Īfter fixing the MacOS, I would like to see if TestDisk can have a go at the Windows Booting issue too. The MS Reserved section has disappeared, but, I still note an apparent overlap and duplication, such as MS Data 3x.Īre there logical steps to proceed with the fix, such as checking the sequence of start-end partitions? Testdisk documentation is not sufficiently clear to me. I then pressed 'Backup' and the Testdisk interface rearranged the information. When I ran Testdisk, it indicated that MS Reserved, EasyRE seems to now overlap the EFI System. I attempted then to repair Windows Boot with various software (including EasyRE), but nothing was resolved.Īccording to Terminal DiskUtil List dev/disk0 (seems EFI system is missing) Windows on the bootcamp side failed after a power cut a year ago. A GUID Partition table partitioning scheme is required." The message: "macOS could not be installed on your computer. I recently wanted to update my iMac (High Sierra, late 2012) and this failed.
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