Lost macOS boot option after using EaseUS partition to resize Windows partition

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Asked 3 years, 9 months ago

Modified 3 years, 9 months ago

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I am using a Macbook Air. After I installed Windows 10, I wanted to resize the Windows Partition and create a new partition to use data.

After that, Windows informs me that a recovery error - cannot boot to Windows. And I reinstall Windows again.

Then after I can enter to Windows desktop, bootcamp informs me that "could not locate macOS volume"

Then I get this error.

The option to boot to macOS has disappeared, only Windows remains.

Then I use DiskUtil to check. The macOS volume partition type is marked as "unknown".

Jaime Santa Cruz

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asked Mar 9, 2021 at 12:39

Vu_takeshi

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Precisely which model of MacBook Air & what macOS was on it? See also apple.stackexchange.com/questions/340344/… and apple.stackexchange.com/questions/252287/…
– Tetsujin
Commented Mar 9, 2021 at 12:55
I am using Macbook Air late 2014. I forgot MacOS version and I can not access to MacOS to check, but maybe MacOS Sierra
– Vu_takeshi
Commented Mar 9, 2021 at 14:17
How did you use DiskUtil if you can not boot to macOS?
– David Anderson
Commented Mar 10, 2021 at 1:12

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