The startup disk cannot be partitioned or restored to a single partition.

Trying to run BC but it says "The startup disk must be formatted as a single Mac OS Extended (Journaled) volume or already partitioned by Boot Camp Assistant for installing Windows." I read from similar questions to run diskutil list in terminal, but I can't really make any sense out of this. Help would be much appreciated.

Posted on Feb 21, 2018 1:14 PM

Similar questions

"The startup disk cannot be partitioned or restored to a single partition" I reseted my windows on bootcamp and chose to format all the stations(yes I know, stupid), so first I lost my Mac OS, then I reinstalled it and then I lost my window os.So I reinstalled Mac OS via CMD+R and now I want to use Bootcamp Assistant to install windows again.but I get this message: The startup disk cannot be partitioned or restored to a single partition.The startup disk must be formatted as a single Mac OS Extended (Journaled) volume or already partitioned by Boot Camp Assistant for installing Windowsim supposed to just press the " - " right? I'm so losthow can I reinstall bootcamp on my MacBook?
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BOOTCAMP: "The startup disk cannot be partitioned or restored to a single partition" I have a 2015 MacBook Pro 15 inch running the latest Mac OS Mojave update.I have Windows 10 installed through BOOTCAMP but now I want to delete bootcamp & restore the Macintosh HD.When I open Bootcamp Assistant it gives me the following error:"The startup disk cannot be partitioned or restored to a single partition.The startup disk must be formatted as a single Mac OS Extended (Journaled) volume or already partitioned by Boot Camp Assistant for installing Windows."What should I do?Maybe Loner T can help me out?
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Can't delete partitions on Disk Utility. No CoreStorage logical volume groups found. When I ran the command "diskutil cs list", it said No CoreStorage logical volume groups found. I am trying to delete two partitions from disk utility but the - symbol is greyed out. My goal is to have one journaled partition so I can use boot camp assistant to instal windows 7. I have a 2008 macbook. I attached a screenshot. Boot Camp assistant tells me "The startup disk must be formatted as a single Mac OS Extended (Journaled) volume or already partitioned by Boot Camp Assistant for installing Windows." Please advise.
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1 reply

Loner T

Level 9

59,536 points

Feb 21, 2018 2:06 PM in response to jariola

After we cleanup, I recommend disconnecting all external storage/hubs and a SMC/NVRAM Reset before your next attempt at installing Windows.

Run

diskutil eraseVolume jhfs+ BC1 disk0s3

diskutil eraseVolume jhfs+ BC2 disk0s4

diskutil mergePartitions jhfs+ BCMP disk0s3 disk0s4

diskutil list

If you only see disk0s3, then run

diskutil eraseVolume fat32 BOOTCAMP disk0s3

and now run BC Assistant and click on Remove/Restore.

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The startup disk cannot be partitioned or restored to a single partition.

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