Mendiaco Posted October 8, 2017 Share Posted October 8, 2017 When I tried to update to 10.13 I have this error. I am using a HDD, not a SSD.Any solution? thanks. Link to comment Share on other sites More sharing options...
TrustAugustus Posted October 8, 2017 Share Posted October 8, 2017 I had this error too. I for the life of me couldn't figure it out. By any chance did you have multiple partitions with different OSes on the same drive? I tried reformating in windows with multiple tools. But I kept getting errors in the installer as well (after giving up trying to update). I followed this guide to use disk utility to reformat. Link to comment Share on other sites More sharing options...
Mendiaco Posted October 8, 2017 Author Share Posted October 8, 2017 I have 3 physical disks.But in my disks there's only EFI+HFS partition. Link to comment Share on other sites More sharing options...
nightsd01 Posted October 8, 2017 Share Posted October 8, 2017 I had this error as well. What solved it was to remove external hard drives/USB drives that were plugged in except the primary disk. You only need to remove these during the installation, you can plug them back in once installation finishes 1 Link to comment Share on other sites More sharing options...
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