Restore disk to a single macOS partition - reclaiming unallocated space left from Win

I had a bootcamp partition. Bootcamp failed to install Windows, so I deleted the partition. No, no, no, I didn't use Bootcamp to delete this partition. But this is where I am - I now have 500 GB unallocated on my 2 TB disk. I don't want to reformat my SSD to reclaim these unallocated (orphan) GBs. Does anyone know how to do this (please don't tell me to "remove via Bootcamp"), that ship sailed.

Thanks.

Windows, Windows 10

Posted on Sep 11, 2020 7:17 AM

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14962 4

19 replies

Loner T

Level 9

59,606 points

Sep 12, 2020 7:44 AM in response to Jbvoigt

Run

diskutil eraseVolume free free disk0s4

and then run BC Assistant and click on Remove/Restore. The current EFI NONAME partition is not allowing BC Assistant to clean up.

Loner T

Level 9

59,606 points

Sep 13, 2020 9:04 AM in response to Jbvoigt

We can delete the BOOTCAMP partition, and try to expand the macOS side to the full disk. Be aware that OWC SSDs have many issues with Bootcamp. Some do not support installation of Windows.

Jbvoigt Author

Level 1

13 points

Sep 14, 2020 3:59 AM in response to Jbvoigt

Success looks like this.

Back to Bootcamp Assistant.

(Don't know where this came from, but it finished successfully.)

Jbvoigt Author

Level 1

13 points

Sep 14, 2020 4:11 AM in response to Jbvoigt

And, finally, recreate my Data HD partition for joint storage by Bootcamp and Mac, and I'm done. Thanks again to Loner T.

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Restore disk to a single macOS partition - reclaiming unallocated space left from Win