How to deconstruct a software RAID made with macOS Sierra’s Disk Utility
21.07.2016
You can use macOS Sierra’s Disk Utility app to create a software RAID, but you can also use it to delete the RAID.
If you created a RAID using Disk Utility and now you don’t want to use the disks as a RAID anymore, here’s how to delete the RAID. Back up your data first; the procedure deletes the data on the RAID.
The disks that were in your deleted RAID now appear in the External section. To use those disks again, you’ll need to reformat them.
Roman Loyola