![]() After that Windows partition on newly cloned disk should become bootable again. Please note that you should track disk number, partition and letters by your own, it's just an example. Boot to source Windows drive, attach destination drive with cloned partitions, mount EFI volume of destination drive to letter V: (Command Prompt > diskpart > list disk > select disk 2 (2 is your destination drive, double-check this) > list partition > select partition 1 (1 is EFI partition on destination drive, should be 200 MB) > assign letter v: > exit or Win R > diskmgmt.msc > right-click EFI on external drive > Assign letter), execute Command Prompt command BCDBOOT Z:\Windows /S V: /F ALL ( bcdboot, perhaps you could use BIOS or UEFI instead of ALL but I don't know type of your installation) where Z: is your external drive's Windows partition. ![]() Windows might not boot after disk has changed (cloned to). There's also a freeware version of dd for Windows Read raw data off a disk, even if the Mac doesn't understand theįilesystem. Here's a short quote of a good write-up on how it works with screenshots and example that fits your need perfectly:ĭd (disk duplication) is a Mac OS X command-line utility which can This will copy device-to-device by 512-byte blocks keeping your partition map (including EFI contents required to boot Windows). Don't accidentally swap IF with OF or you will erase contents of your source drive. Basically you should get away with dd if=/dev/hdx of=/dev/hdy ( dd) executed in macOS Recovery's Terminal, where if is source and of is destination.
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