the startup disk cannot be partitioned or restored to a single partition boot camp assistant

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Level 1

8 points

the startup disk cannot be partitioned or restored to a single partition boot camp assistant

Hi everyone

how can i make mac book startup disk as a single partition without loosing data?

additional information:

i used about 200 GB of hard drive for installing windows 10, when i went to bootcamp assistance to install windows 10, it showed me the message on above title, i decided to reinstall windows by restarting the macbook and selecting windows 10 cd’s icon , after deleting partitions related to windows there, then I couldn’t format them again for reinstalling windows, after referring to disk utility, I can’t see 200GB related to windows 10 partitions! I want to keep my mac os data while make it as a single partition,

I appreciate in advance if anyone could help me.

Windows, Windows 6

Posted on Jul 7, 2021 4:55 AM

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Answer 1

MeRozhin Author

Level 1

8 points

Jul 7, 2021 6:52 AM in response to Loner T

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Answer 2

Loner T

Level 9

59,536 points

Jul 7, 2021 5:28 AM in response to MeRozhin

From macOS Terminal, post the output of

diskutil list

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Answer 3

Loner T

Level 9

59,536 points

Jul 8, 2021 5:41 AM in response to MeRozhin

On a 2011 Mac, to run W10, it should have been upgraded from W7. A clean installation of W10 is not supported on 2011 and older Macs. See Install Windows 10 on your Mac with Boot Camp Assistant - Apple Support. If you need to remove and re-install Windows, you will need to follow the same path.

Also, the disk layout that you have does not support W7.

Normally, a Mac uses a GPT layout.

Before macOS High Sierra, the disk layout is EFI, macOS (Apple HFS+), Recovery HD and Windows.
After macOS High Sierra, the disk layout is EFI macOS (Apple APFS), Windows

Your disk was formatted as a Windows PC disk, not as a Mac disk. If you backup macOS (using Time Machine) and wipe the whole disk, we can restore macOS, and then re-install W7 and then run an in-place upgrade to W10.

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Answer 4

Loner T

Level 9

59,536 points

Jul 7, 2021 10:35 PM in response to MeRozhin

macOS Lion (10.7.x) is fairly old. It will not support W10. What year is your Mac? Click on More Info. Do not post the serial number of your Mac.

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Answer 5

MeRozhin Author

Level 1

8 points

Jul 7, 2021 3:17 PM in response to Loner T

When i installed windows 7 for the first time on mac os x I did this partition. several years ago when i wanted to install windows 10, this happened. I don’t actually remember what did i do, but sth happened to my BC assistant so I wouldn’t be able to install windows by it normally.

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Answer 6

Loner T

Level 9

59,536 points

Jul 7, 2021 8:37 AM in response to MeRozhin

This is not a layout that BC Assistant supports. How was this partition layout created?
What is the year/model of your Mac (do not post the serial number)?
What is the current macOS version?

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