a friend of mine bought a second hand iMac and they erased sort of everything from the iMac before it was given to him. There is no OS installed and it's not possible to instal a new version from OSX from Internet Recovery because the Hard Drive is greyed out. When I open terminal and check distil list this shows up: Diskutil List What are those 17 disks? and how can I remove them and rebuild the whole harddrive? Everywhere I look they say that is should have an UUID but when I use diskutil cs list it says "No CoreStorage logical volume groups found".

iMac 27" early 2016 2TB Fusion 8GB Ram Internet recovery (El Capitan)

I hope there is someone that can help me!

So this is actually my question. Can I delete everything there is on this harddrive and rebuild it al?



  • It may be easiest to take that hard drive and put it into another machine to format, partition and reinstall. Or, will it start in « disk mode » and you access / format etc it from another machine? – Solar Mike Jan 22 '18 at 9:46
  • 1
    Do you mean Target Disk mode? – Alex Jan 22 '18 at 9:48
  • yes, and couldn’t think of the correct name - thanks! Have done the first method often, but not tried the second... – Solar Mike Jan 22 '18 at 9:50

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