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Well, I've got a little problem with my SSD.

I had Windows installed through the bootcamp, when macOS offered me a High Sierra update. I've updated. But when I wanted to remove Windows, I could not do it. I had to delete it via the Disk Utility. And then I ran into a problem: I had 2 containers on one internal physical disk.

Divided ssd

But how do I unite them now, so that the empty merged with the system without loss of information?

Here is my diskutil list:

enter image description here

  • @klanomath thank you for quick response It seems I cannot get any output: gpt show: unable to open device 'disk0': Operation not permitted – Vladimir Bykov Dec 30 '17 at 19:46
  • Your forgot to prepend sudo – klanomath Dec 30 '17 at 19:47
  • So guys, what should I do now? How I can disable System Integrity Protection? – Vladimir Bykov Dec 30 '17 at 19:56
  • @klanomath sorry, my mistake! Yes, I have High Sierra – Vladimir Bykov Dec 30 '17 at 20:00
  • You may post the output of diskutil list. – klanomath Dec 30 '17 at 20:03
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Use the commands given below to preform the merge.

Note: These commands will delete the noname volume, therefore you may want to backup this volume.

diskutil apfs deleteContainer disk0s3
diskutil eraseVolume free n disk0s3
diskutil apfs resizeContainer disk0s2 0

If a command fails, try prepending a sudo.

  • Also worked well for me. I merged two partitions on an external hard drive via diskutil mergePartitions ExFAT DesiredVolumeName disk2s1 disk2s2 – Nate Feb 10 '18 at 7:47
  • It worked for me on 10.13.5. – Parth Adroja Jul 8 '18 at 18:57
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Below answer is given by Apple Tech Support guy.

Open terminal -> type distutil list -> type diskutil mergePartitions JHFS+ Macintosh disk0s2 disk0s4

Note: disk0s2 is the SSD disk0s4 is the disk which you want to erase and merge into main disk SSD.

Hope this helps!

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